1.
International Computers Limited
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International Computers Limited was a large British computer hardware, computer software and computer services company that operated from 1968 until 2002. It was formed through a merger of International Computers and Tabulators, English Electric Leo Marconi, the companys most successful product line was the ICL2900 Series range of mainframe computers. In later years, ICL attempted to diversify its product line, despite significant sales in overseas markets, ICLs mainframe base was dominated by large contracts from the UK public sector. Significant customers included Post Office Ltd, the Inland Revenue, the Department for Work and Pensions, ICL also had a strong market share with UK local authorities and nationalized utilities including the water, electricity, and gas boards. The company was acquired by Fujitsu, and in April 2002 it was rebranded as Fujitsu. International Computers Limited was formed in 1968 as a part of the Industrial Expansion Act of the Wilson Labour Government, ICL was an initiative of Tony Benn, the Minister of Technology, to create a British computer industry that could compete with major world manufacturers like IBM. ICL represented the last step in a series of mergers that had taken place in the industry since the late 1950s, EELM was itself a merger of the computer divisions of English Electric, LEO and Marconi. Upon its creation, the British government held a ten percent stake in the company, the new board decided that the 1900 should be phased out in favour of the System 4, but shortly afterwards reversed the decision. It is probable that this was due to union and political pressure from the Wilson government. In any event, most of the original EEC board resigned over the interference as they believed that the 1900 series was doomed from the outset, ICL initially thrived, but relied almost wholly on supplying the UK public sector with computers. In 1962 ICT delivered the first ICT1300 series computer which was its first transistor machine, a small team from Ferrantis Canadian subsidiary, Ferranti-Packard, visited the various Ferranti computer labs and saw their work on a next-generation machine. On their return home they produced the Ferranti-Packard 6000 in a short period of time, developing the machine, compilers. A feature of the Executive operating system was its ability to multi task, the machine went on to have some success and sold in small numbers in Canada and the United States. In 1964 ICT purchased the division of Ferranti in another government-forced merger. Ferranti had been building a number of scientific machines based on various university designs since the 1950s. None of these could be considered successful, however. Meanwhile, ICT management in England was looking to rejuvenate their line-up, their latest developments, Management looked at the FP6000 as well as licensing the RCA Spectra 70, an IBM System/360-clone. In the end it was decided to go with the FP6000 as the basis for a line of small-to-midrange machines
2.
Software developer
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A software developer is a person concerned with facets of the software development process, including the research, design, programming, and testing of computer software. Other job titles which are used with similar meanings are programmer, software analyst. According to developer Eric Sink, the differences between system design, software development, and programming are more apparent, even more so that developers become systems architects, those who design the multi-leveled architecture or component interactions of a large software system. In a large company, there may be employees whose sole responsibility consists of one of the phases above. In smaller development environments, a few people or even an individual might handle the complete process. The word software was coined as a prank as early as 1953, before this time, computers were programmed either by customers, or the few commercial computer vendors of the time, such as UNIVAC and IBM. The first company founded to provide products and services was Computer Usage Company in 1955. The software industry expanded in the early 1960s, almost immediately after computers were first sold in mass-produced quantities, universities, government, and business customers created a demand for software. Many of these programs were written in-house by full-time staff programmers, some were distributed freely between users of a particular machine for no charge. Others were done on a basis, and other firms such as Computer Sciences Corporation started to grow. The computer/hardware makers started bundling operating systems, systems software and programming environments with their machines, new software was built for microcomputers, so other manufacturers including IBM, followed DECs example quickly, resulting in the IBM AS/400 amongst others. The industry expanded greatly with the rise of the computer in the mid-1970s. In the following years, it created a growing market for games, applications. DOS, Microsofts first operating system product, was the dominant operating system at the time, by 2014 the role of cloud developer had been defined, in this context, one definition of a developer in general was published, Developers make software for the world to use. The job of a developer is to crank out code -- fresh code for new products, code fixes for maintenance, code for business logic, bus factor Software Developer description from the US Department of Labor
3.
Programming language
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A programming language is a formal computer language designed to communicate instructions to a machine, particularly a computer. Programming languages can be used to programs to control the behavior of a machine or to express algorithms. From the early 1800s, programs were used to direct the behavior of such as Jacquard looms. Thousands of different programming languages have created, mainly in the computer field. Many programming languages require computation to be specified in an imperative form while other languages use forms of program specification such as the declarative form. The description of a language is usually split into the two components of syntax and semantics. Some languages are defined by a document while other languages have a dominant implementation that is treated as a reference. Some languages have both, with the language defined by a standard and extensions taken from the dominant implementation being common. A programming language is a notation for writing programs, which are specifications of a computation or algorithm, some, but not all, authors restrict the term programming language to those languages that can express all possible algorithms. For example, PostScript programs are created by another program to control a computer printer or display. More generally, a language may describe computation on some, possibly abstract. It is generally accepted that a specification for a programming language includes a description, possibly idealized. In most practical contexts, a programming language involves a computer, consequently, abstractions Programming languages usually contain abstractions for defining and manipulating data structures or controlling the flow of execution. Expressive power The theory of computation classifies languages by the computations they are capable of expressing, all Turing complete languages can implement the same set of algorithms. ANSI/ISO SQL-92 and Charity are examples of languages that are not Turing complete, markup languages like XML, HTML, or troff, which define structured data, are not usually considered programming languages. Programming languages may, however, share the syntax with markup languages if a computational semantics is defined, XSLT, for example, is a Turing complete XML dialect. Moreover, LaTeX, which is used for structuring documents. The term computer language is used interchangeably with programming language
4.
Open-source software
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Open-source software may be developed in a collaborative public manner. According to scientists who studied it, open-source software is a prominent example of open collaboration, a 2008 report by the Standish Group states that adoption of open-source software models has resulted in savings of about $60 billion per year to consumers. In the early days of computing, programmers and developers shared software in order to learn from each other, eventually the open source notion moved to the way side of commercialization of software in the years 1970-1980. In 1997, Eric Raymond published The Cathedral and the Bazaar and this source code subsequently became the basis behind SeaMonkey, Mozilla Firefox, Thunderbird and KompoZer. Netscapes act prompted Raymond and others to look into how to bring the Free Software Foundations free software ideas, the new term they chose was open source, which was soon adopted by Bruce Perens, publisher Tim OReilly, Linus Torvalds, and others. The Open Source Initiative was founded in February 1998 to encourage use of the new term, a Microsoft executive publicly stated in 2001 that open source is an intellectual property destroyer. I cant imagine something that could be worse than this for the software business, IBM, Oracle, Google and State Farm are just a few of the companies with a serious public stake in todays competitive open-source market. There has been a significant shift in the corporate philosophy concerning the development of FOSS, the free software movement was launched in 1983. In 1998, a group of individuals advocated that the free software should be replaced by open-source software as an expression which is less ambiguous. Software developers may want to publish their software with an open-source license, the Open Source Definition, notably, presents an open-source philosophy, and further defines the terms of usage, modification and redistribution of open-source software. Software licenses grant rights to users which would otherwise be reserved by law to the copyright holder. Several open-source software licenses have qualified within the boundaries of the Open Source Definition, the open source label came out of a strategy session held on April 7,1998 in Palo Alto in reaction to Netscapes January 1998 announcement of a source code release for Navigator. They used the opportunity before the release of Navigators source code to clarify a potential confusion caused by the ambiguity of the free in English. Many people claimed that the birth of the Internet, since 1969, started the open source movement, the Free Software Foundation, started in 1985, intended the word free to mean freedom to distribute and not freedom from cost. Since a great deal of free software already was free of charge, such software became associated with zero cost. The Open Source Initiative was formed in February 1998 by Eric Raymond and they sought to bring a higher profile to the practical benefits of freely available source code, and they wanted to bring major software businesses and other high-tech industries into open source. Perens attempted to open source as a service mark for the OSI. The Open Source Initiatives definition is recognized by governments internationally as the standard or de facto definition, OSI uses The Open Source Definition to determine whether it considers a software license open source
5.
Software release life cycle
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Usage of the alpha/beta test terminology originated at IBM. As long ago as the 1950s, IBM used similar terminology for their hardware development, a test was the verification of a new product before public announcement. B test was the verification before releasing the product to be manufactured, C test was the final test before general availability of the product. Martin Belsky, a manager on some of IBMs earlier software projects claimed to have invented the terminology, IBM dropped the alpha/beta terminology during the 1960s, but by then it had received fairly wide notice. The usage of beta test to refer to testing done by customers was not done in IBM, rather, IBM used the term field test. Pre-alpha refers to all activities performed during the project before formal testing. These activities can include requirements analysis, software design, software development, in typical open source development, there are several types of pre-alpha versions. Milestone versions include specific sets of functions and are released as soon as the functionality is complete, the alpha phase of the release life cycle is the first phase to begin software testing. In this phase, developers generally test the software using white-box techniques, additional validation is then performed using black-box or gray-box techniques, by another testing team. Moving to black-box testing inside the organization is known as alpha release, alpha software can be unstable and could cause crashes or data loss. Alpha software may not contain all of the features that are planned for the final version, in general, external availability of alpha software is uncommon in proprietary software, while open source software often has publicly available alpha versions. The alpha phase usually ends with a freeze, indicating that no more features will be added to the software. At this time, the software is said to be feature complete, Beta, named after the second letter of the Greek alphabet, is the software development phase following alpha. Software in the stage is also known as betaware. Beta phase generally begins when the software is complete but likely to contain a number of known or unknown bugs. Software in the phase will generally have many more bugs in it than completed software, as well as speed/performance issues. The focus of beta testing is reducing impacts to users, often incorporating usability testing, the process of delivering a beta version to the users is called beta release and this is typically the first time that the software is available outside of the organization that developed it. Beta version software is useful for demonstrations and previews within an organization
6.
X86-64
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X86-64 is the 64-bit version of the x86 instruction set. It supports vastly larger amounts of memory and physical memory than is possible on its 32-bit predecessors. X86-64 also provides 64-bit general-purpose registers and numerous other enhancements and it is fully backward compatible with 16-bit and 32-bit x86 code. The original specification, created by AMD and released in 2000, has been implemented by AMD, Intel, the AMD K8 processor was the first to implement the architecture, this was the first significant addition to the x86 architecture designed by a company other than Intel. Intel was forced to suit and introduced a modified NetBurst family which was fully software-compatible with AMDs design. VIA Technologies introduced x86-64 in their VIA Isaiah architecture, with the VIA Nano, the x86-64 specification is distinct from the Intel Itanium architecture, which is not compatible on the native instruction set level with the x86 architecture. AMD64 was created as an alternative to the radically different IA-64 architecture, the first AMD64-based processor, the Opteron, was released in April 2003. AMDs processors implementing the AMD64 architecture include Opteron, Athlon 64, Athlon 64 X2, Athlon 64 FX, Athlon II, Turion 64, Turion 64 X2, Sempron, Phenom, Phenom II, FX, Fusion and Ryzen. The primary defining characteristic of AMD64 is the availability of 64-bit general-purpose processor registers, 64-bit integer arithmetic and logical operations, the designers took the opportunity to make other improvements as well. Some of the most significant changes are described below, pushes and pops on the stack default to 8-byte strides, and pointers are 8 bytes wide. Additional registers In addition to increasing the size of the general-purpose registers, AMD64 still has fewer registers than many common RISC instruction sets or VLIW-like machines such as the IA-64. However, an AMD64 implementation may have far more internal registers than the number of architectural registers exposed by the instruction set, additional XMM registers Similarly, the number of 128-bit XMM registers is also increased from 8 to 16. Larger virtual address space The AMD64 architecture defines a 64-bit virtual address format and this allows up to 256 TB of virtual address space. The architecture definition allows this limit to be raised in future implementations to the full 64 bits and this is compared to just 4 GB for the x86. This means that very large files can be operated on by mapping the entire file into the address space, rather than having to map regions of the file into. Larger physical address space The original implementation of the AMD64 architecture implemented 40-bit physical addresses, current implementations of the AMD64 architecture extend this to 48-bit physical addresses and therefore can address up to 256 TB of RAM. The architecture permits extending this to 52 bits in the future, for comparison, 32-bit x86 processors are limited to 64 GB of RAM in Physical Address Extension mode, or 4 GB of RAM without PAE mode. Any implementation therefore allows the physical address limit as under long mode
7.
Kernel (operating system)
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The kernel is a computer program that is the core of a computers operating system, with complete control over everything in the system. It is the first program loaded on start-up and it handles the rest of start-up as well as input/output requests from software, translating them into data-processing instructions for the central processing unit. It handles memory and peripherals like keyboards, monitors, printers, the critical code of the kernel is usually loaded into a protected area of memory, which prevents it from being overwritten by applications or other, more minor parts of the operating system. The kernel performs its tasks, such as running processes and handling interrupts, in contrast, everything a user does is in user space, writing text in a text editor, running programs in a GUI, etc. This separation prevents user data and kernel data from interfering with other and causing instability. The kernels interface is an abstraction layer. When a process makes requests of the kernel, it is called a system call, Kernel designs differ in how they manage these system calls and resources. A monolithic kernel runs all the operating instructions in the same address space. A microkernel runs most processes in space, for modularity. The kernel takes responsibility for deciding at any time which of the running programs should be allocated to the processor or processors. Random-access memory Random-access memory is used to both program instructions and data. Typically, both need to be present in memory in order for a program to execute, often multiple programs will want access to memory, frequently demanding more memory than the computer has available. The kernel is responsible for deciding which memory each process can use, input/output devices I/O devices include such peripherals as keyboards, mice, disk drives, printers, network adapters, and display devices. The kernel allocates requests from applications to perform I/O to an appropriate device, key aspects necessary in resource management are the definition of an execution domain and the protection mechanism used to mediate the accesses to the resources within a domain. Kernels also usually provide methods for synchronization and communication between processes called inter-process communication, finally, a kernel must provide running programs with a method to make requests to access these facilities. The kernel has full access to the memory and must allow processes to safely access this memory as they require it. Often the first step in doing this is virtual addressing, usually achieved by paging and/or segmentation, virtual addressing allows the kernel to make a given physical address appear to be another address, the virtual address. This allows every program to behave as if it is the one running
8.
Bible
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The Bible is a collection of sacred texts or scriptures that Jews and Christians consider to be a product of divine inspiration and a record of the relationship between God and humans. Many different authors contributed to the Bible, what is regarded as canonical text differs depending on traditions and groups, a number of Bible canons have evolved, with overlapping and diverging contents. The Christian Old Testament overlaps with the Hebrew Bible and the Greek Septuagint, the New Testament is a collection of writings by early Christians, believed to be mostly Jewish disciples of Christ, written in first-century Koine Greek. These early Christian Greek writings consist of narratives, letters, among Christian denominations there is some disagreement about the contents of the canon, primarily the Apocrypha, a list of works that are regarded with varying levels of respect. Attitudes towards the Bible also differ amongst Christian groups and this concept arose during the Protestant Reformation, and many denominations today support the use of the Bible as the only source of Christian teaching. With estimated total sales of over 5 billion copies, the Bible is widely considered to be the book of all time. It has estimated sales of 100 million copies, and has been a major influence on literature and history, especially in the West. The English word Bible is from the Latin biblia, from the word in Medieval Latin and Late Latin. Medieval Latin biblia is short for biblia sacra holy book, while biblia in Greek and it gradually came to be regarded as a feminine singular noun in medieval Latin, and so the word was loaned as a singular into the vernaculars of Western Europe. Latin biblia sacra holy books translates Greek τὰ βιβλία τὰ ἅγια ta biblia ta hagia, the word βιβλίον itself had the literal meaning of paper or scroll and came to be used as the ordinary word for book. It is the diminutive of βύβλος byblos, Egyptian papyrus, possibly so called from the name of the Phoenician sea port Byblos from whence Egyptian papyrus was exported to Greece, the Greek ta biblia was an expression Hellenistic Jews used to describe their sacred books. Christian use of the term can be traced to c.223 CE, bruce notes that Chrysostom appears to be the first writer to use the Greek phrase ta biblia to describe both the Old and New Testaments together. The division of the Hebrew Bible into verses is based on the sof passuk cantillation mark used by the 10th-century Masoretes to record the verse divisions used in oral traditions. The oldest extant copy of a complete Bible is an early 4th-century parchment book preserved in the Vatican Library, the oldest copy of the Tanakh in Hebrew and Aramaic dates from the 10th century CE. The oldest copy of a complete Latin Bible is the Codex Amiatinus and he states that it is not a magical book, nor was it literally written by God and passed to mankind. In Christian Bibles, the New Testament Gospels were derived from traditions in the second half of the first century CE. Riches says that, Scholars have attempted to reconstruct something of the history of the oral traditions behind the Gospels, the period of transmission is short, less than 40 years passed between the death of Jesus and the writing of Marks Gospel. This means that there was time for oral traditions to assume fixed form
9.
Operating system
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An operating system is system software that manages computer hardware and software resources and provides common services for computer programs. All computer programs, excluding firmware, require a system to function. Operating systems are found on many devices that contain a computer – from cellular phones, the dominant desktop operating system is Microsoft Windows with a market share of around 83. 3%. MacOS by Apple Inc. is in place, and the varieties of Linux is in third position. Linux distributions are dominant in the server and supercomputing sectors, other specialized classes of operating systems, such as embedded and real-time systems, exist for many applications. A single-tasking system can run one program at a time. Multi-tasking may be characterized in preemptive and co-operative types, in preemptive multitasking, the operating system slices the CPU time and dedicates a slot to each of the programs. Unix-like operating systems, e. g. Solaris, Linux, cooperative multitasking is achieved by relying on each process to provide time to the other processes in a defined manner. 16-bit versions of Microsoft Windows used cooperative multi-tasking, 32-bit versions of both Windows NT and Win9x, used preemptive multi-tasking. Single-user operating systems have no facilities to distinguish users, but may allow multiple programs to run in tandem, a distributed operating system manages a group of distinct computers and makes them appear to be a single computer. The development of networked computers that could be linked and communicate with each other gave rise to distributed computing, distributed computations are carried out on more than one machine. When computers in a work in cooperation, they form a distributed system. The technique is used both in virtualization and cloud computing management, and is common in large server warehouses, embedded operating systems are designed to be used in embedded computer systems. They are designed to operate on small machines like PDAs with less autonomy and they are able to operate with a limited number of resources. They are very compact and extremely efficient by design, Windows CE and Minix 3 are some examples of embedded operating systems. A real-time operating system is a system that guarantees to process events or data by a specific moment in time. A real-time operating system may be single- or multi-tasking, but when multitasking, early computers were built to perform a series of single tasks, like a calculator. Basic operating system features were developed in the 1950s, such as resident monitor functions that could run different programs in succession to speed up processing
10.
United States
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Forty-eight of the fifty states and the federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east, the state of Hawaii is an archipelago in the mid-Pacific Ocean. The U. S. territories are scattered about the Pacific Ocean, the geography, climate and wildlife of the country are extremely diverse. At 3.8 million square miles and with over 324 million people, the United States is the worlds third- or fourth-largest country by area, third-largest by land area. It is one of the worlds most ethnically diverse and multicultural nations, paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century, the United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the following the Seven Years War led to the American Revolution. On July 4,1776, during the course of the American Revolutionary War, the war ended in 1783 with recognition of the independence of the United States by Great Britain, representing the first successful war of independence against a European power. The current constitution was adopted in 1788, after the Articles of Confederation, the first ten amendments, collectively named the Bill of Rights, were ratified in 1791 and designed to guarantee many fundamental civil liberties. During the second half of the 19th century, the American Civil War led to the end of slavery in the country. By the end of century, the United States extended into the Pacific Ocean. The Spanish–American War and World War I confirmed the status as a global military power. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the sole superpower. The U. S. is a member of the United Nations, World Bank, International Monetary Fund, Organization of American States. The United States is a developed country, with the worlds largest economy by nominal GDP. It ranks highly in several measures of performance, including average wage, human development, per capita GDP. While the U. S. economy is considered post-industrial, characterized by the dominance of services and knowledge economy, the United States is a prominent political and cultural force internationally, and a leader in scientific research and technological innovations. In 1507, the German cartographer Martin Waldseemüller produced a map on which he named the lands of the Western Hemisphere America after the Italian explorer and cartographer Amerigo Vespucci
11.
Multi-core processor
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A multi-core processor is a single computing component with two or more independent actual processing units, which are units that read and execute program instructions. The instructions are ordinary CPU instructions, but the multiple cores can run multiple instructions at the same time, manufacturers typically integrate the cores onto a single integrated circuit die, or onto multiple dies in a single chip package. A multi-core processor implements multiprocessing in a physical package. Designers may couple cores in a multi-core device tightly or loosely, for example, cores may or may not share caches, and they may implement message passing or shared-memory inter-core communication methods. Common network topologies to interconnect cores include bus, ring, two-dimensional mesh, homogeneous multi-core systems include only identical cores, heterogeneous multi-core systems have cores that are not identical. Just as with single-processor systems, cores in multi-core systems may implement architectures such as VLIW, superscalar, Multi-core processors are widely used across many application domains, including general-purpose, embedded, network, digital signal processing, and graphics. The improvement in performance gained by the use of a multi-core processor depends very much on the algorithms used. In particular, possible gains are limited by the fraction of the software that can run in parallel simultaneously on multiple cores, most applications, however, are not accelerated so much unless programmers invest a prohibitive amount of effort in re-factoring the whole problem. The parallelization of software is a significant ongoing topic of research, the terms multi-core and dual-core most commonly refer to some sort of central processing unit, but are sometimes also applied to digital signal processors and system on a chip. This article uses the terms multi-core and dual-core for CPUs manufactured on the integrated circuit. In contrast to systems, the term multi-CPU refers to multiple physically separate processing-units. The terms many-core and massively multi-core are sometimes used to describe multi-core architectures with a high number of cores. Some systems use many soft microprocessor cores placed on a single FPGA, each core can be considered a semiconductor intellectual property core as well as a CPU core. While manufacturing technology improves, reducing the size of individual gates and these physical limitations can cause significant heat dissipation and data synchronization problems. Various other methods are used to improve CPU performance, some instruction-level parallelism methods such as superscalar pipelining are suitable for many applications, but are inefficient for others that contain difficult-to-predict code. Many applications are better suited to thread-level parallelism methods, and multiple independent CPUs are commonly used to increase a systems overall TLP, a combination of increased available space and the demand for increased TLP led to the development of multi-core CPUs. Several business motives drive the development of multi-core architectures, for decades, it was possible to improve performance of a CPU by shrinking the area of the integrated circuit, which reduced the cost per device on the IC. Alternatively, for the circuit area, more transistors could be used in the design
12.
Public domain
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The term public domain has two senses of meaning. Anything published is out in the domain in the sense that it is available to the public. Once published, news and information in books is in the public domain, in the sense of intellectual property, works in the public domain are those whose exclusive intellectual property rights have expired, have been forfeited, or are inapplicable. Examples for works not covered by copyright which are therefore in the domain, are the formulae of Newtonian physics, cooking recipes. Examples for works actively dedicated into public domain by their authors are reference implementations of algorithms, NIHs ImageJ. The term is not normally applied to situations where the creator of a work retains residual rights, as rights are country-based and vary, a work may be subject to rights in one country and be in the public domain in another. Some rights depend on registrations on a basis, and the absence of registration in a particular country, if required. Although the term public domain did not come into use until the mid-18th century, the Romans had a large proprietary rights system where they defined many things that cannot be privately owned as res nullius, res communes, res publicae and res universitatis. The term res nullius was defined as not yet appropriated. The term res communes was defined as things that could be enjoyed by mankind, such as air, sunlight. The term res publicae referred to things that were shared by all citizens, when the first early copyright law was first established in Britain with the Statute of Anne in 1710, public domain did not appear. However, similar concepts were developed by British and French jurists in the eighteenth century, instead of public domain they used terms such as publici juris or propriété publique to describe works that were not covered by copyright law. The phrase fall in the domain can be traced to mid-nineteenth century France to describe the end of copyright term. In this historical context Paul Torremans describes copyright as a coral reef of private right jutting up from the ocean of the public domain. Because copyright law is different from country to country, Pamela Samuelson has described the public domain as being different sizes at different times in different countries. According to James Boyle this definition underlines common usage of the public domain and equates the public domain to public property. However, the usage of the public domain can be more granular. Such a definition regards work in copyright as private property subject to fair use rights, the materials that compose our cultural heritage must be free for all living to use no less than matter necessary for biological survival
13.
Open-source model
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Open-source software may be developed in a collaborative public manner. According to scientists who studied it, open-source software is a prominent example of open collaboration, a 2008 report by the Standish Group states that adoption of open-source software models has resulted in savings of about $60 billion per year to consumers. In the early days of computing, programmers and developers shared software in order to learn from each other, eventually the open source notion moved to the way side of commercialization of software in the years 1970-1980. In 1997, Eric Raymond published The Cathedral and the Bazaar and this source code subsequently became the basis behind SeaMonkey, Mozilla Firefox, Thunderbird and KompoZer. Netscapes act prompted Raymond and others to look into how to bring the Free Software Foundations free software ideas, the new term they chose was open source, which was soon adopted by Bruce Perens, publisher Tim OReilly, Linus Torvalds, and others. The Open Source Initiative was founded in February 1998 to encourage use of the new term, a Microsoft executive publicly stated in 2001 that open source is an intellectual property destroyer. I cant imagine something that could be worse than this for the software business, IBM, Oracle, Google and State Farm are just a few of the companies with a serious public stake in todays competitive open-source market. There has been a significant shift in the corporate philosophy concerning the development of FOSS, the free software movement was launched in 1983. In 1998, a group of individuals advocated that the free software should be replaced by open-source software as an expression which is less ambiguous. Software developers may want to publish their software with an open-source license, the Open Source Definition, notably, presents an open-source philosophy, and further defines the terms of usage, modification and redistribution of open-source software. Software licenses grant rights to users which would otherwise be reserved by law to the copyright holder. Several open-source software licenses have qualified within the boundaries of the Open Source Definition, the open source label came out of a strategy session held on April 7,1998 in Palo Alto in reaction to Netscapes January 1998 announcement of a source code release for Navigator. They used the opportunity before the release of Navigators source code to clarify a potential confusion caused by the ambiguity of the free in English. Many people claimed that the birth of the Internet, since 1969, started the open source movement, the Free Software Foundation, started in 1985, intended the word free to mean freedom to distribute and not freedom from cost. Since a great deal of free software already was free of charge, such software became associated with zero cost. The Open Source Initiative was formed in February 1998 by Eric Raymond and they sought to bring a higher profile to the practical benefits of freely available source code, and they wanted to bring major software businesses and other high-tech industries into open source. Perens attempted to open source as a service mark for the OSI. The Open Source Initiatives definition is recognized by governments internationally as the standard or de facto definition, OSI uses The Open Source Definition to determine whether it considers a software license open source
14.
Protection ring
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In computer science, hierarchical protection domains, often called protection rings, are mechanisms to protect data and functionality from faults and malicious behaviour. This approach is diametrically opposite to that of capability-based security, computer operating systems provide different levels of access to resources. A protection ring is one of two or more levels or layers of privilege within the architecture of a computer system. This is generally hardware-enforced by some CPU architectures that provide different CPU modes at the hardware or microcode level, rings are arranged in a hierarchy from most privileged to least privileged. On most operating systems, Ring 0 is the level with the most privileges and interacts most directly with the hardware such as the CPU. Special gates between rings are provided to allow an outer ring to access an inner rings resources in a predefined manner, correctly gating access between rings can improve security by preventing programs from one ring or privilege level from misusing resources intended for programs in another. Programs such as web browsers running in higher numbered rings must request access to the network, multiple rings of protection were among the most revolutionary concepts introduced by the Multics operating system, a highly secure predecessor of todays Unix family of operating systems. However, most general-purpose systems use only two rings, even if the hardware they run on provides more CPU modes than that, many modern CPU architectures include some form of ring protection, although the Windows NT operating system, like Unix, does not fully utilize this feature. OS/2 did to some extent, using three rings, ring 0 for kernel code and device drivers, ring 2 for privileged code, under DOS, the kernel, drivers and applications typically run on ring 3, whereas 386 memory managers such as EMM386 run at ring 0. In addition to this, DR-DOS EMM3863. xx can optionally run some modules on ring 1 instead, openVMS uses four modes called Kernel, Executive, Supervisor and User. The original Multics system had eight rings, but many systems have fewer. The hardware remains aware of the current ring of the executing instruction thread at all times, in some systems, areas of virtual memory are instead assigned ring numbers in hardware. One example is the Data General Eclipse MV/8000, in which the top three bits of the program served as the ring register. The hardware severely restricts the ways in which control can be passed from one ring to another, the hardware restrictions are designed to limit opportunities for accidental or malicious breaches of security. In addition, the most privileged ring may be given special capabilities, the ARM v7 architecture implements three privilege levels, application, operating system, and hypervisor. Unusually, level 0 is the level, while level 2 is the most-privileged level. Ring protection can be combined with processor modes in some systems, operating systems running on hardware supporting both may use both forms of protection or only one. Effective use of ring architecture requires close cooperation between hardware and the operating system, operating systems designed to work on multiple hardware platforms may make only limited use of rings if they are not present on every supported platform
15.
Computer network
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A computer network or data network is a telecommunications network which allows nodes to share resources. In computer networks, networked computing devices exchange data with other using a data link. The connections between nodes are established using either cable media or wireless media, the best-known computer network is the Internet. Network computer devices that originate, route and terminate the data are called network nodes, nodes can include hosts such as personal computers, phones, servers as well as networking hardware. Two such devices can be said to be networked together when one device is able to exchange information with the other device, Computer networks differ in the transmission medium used to carry their signals, communications protocols to organize network traffic, the networks size, topology and organizational intent. In most cases, application-specific communications protocols are layered over other more general communications protocols and this formidable collection of information technology requires skilled network management to keep it all running reliably. The chronology of significant computer-network developments includes, In the late 1950s, in 1960, the commercial airline reservation system semi-automatic business research environment went online with two connected mainframes. Licklider developed a group he called the Intergalactic Computer Network. In 1964, researchers at Dartmouth College developed the Dartmouth Time Sharing System for distributed users of computer systems. The same year, at Massachusetts Institute of Technology, a group supported by General Electric and Bell Labs used a computer to route. Throughout the 1960s, Leonard Kleinrock, Paul Baran, and Donald Davies independently developed network systems that used packets to transfer information between computers over a network, in 1965, Thomas Marill and Lawrence G. Roberts created the first wide area network. This was an precursor to the ARPANET, of which Roberts became program manager. Also in 1965, Western Electric introduced the first widely used telephone switch that implemented true computer control, in 1972, commercial services using X.25 were deployed, and later used as an underlying infrastructure for expanding TCP/IP networks. In July 1976, Robert Metcalfe and David Boggs published their paper Ethernet, Distributed Packet Switching for Local Computer Networks, in 1979, Robert Metcalfe pursued making Ethernet an open standard. In 1976, John Murphy of Datapoint Corporation created ARCNET, a network first used to share storage devices. In 1995, the transmission speed capacity for Ethernet increased from 10 Mbit/s to 100 Mbit/s, by 1998, Ethernet supported transmission speeds of a Gigabit. Subsequently, higher speeds of up to 100 Gbit/s were added, the ability of Ethernet to scale easily is a contributing factor to its continued use. Providing access to information on shared storage devices is an important feature of many networks, a network allows sharing of files, data, and other types of information giving authorized users the ability to access information stored on other computers on the network
16.
Third Temple
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The Third Temple, or Ezekiels Temple, is a Holy Temple architecturally described and prophesied in the Book of Ezekiel, a house of prayer for all people with a sacrificial service. It is noted by Ezekiel as an eternal edifice and permanent dwelling place of the God of Israel on the Temple Mount in Jerusalem and this Temple would be the third central religious space for Jews after Solomons Temple and the rebuilt Second Temple. Although it has not been built, prospects for its completion are important in Jewish eschatology, the architecture of the temple is described in detail in Chapters 40 to 42 of Ezekiel. Maimonides qualified those chapters as complex for the reader and even for the seasoned scholar. The layout and measurements of the building are described in detail, each cherub had two faces, the face of a human being toward the palm tree on one side and the face of a lion toward the palm tree on the other. Since the destruction of the Second Temple in 70 CE, religious Jews have expressed their desire to see the building of a Third Temple on the Temple Mount, prayer for this is a formal part of the Jewish tradition of thrice daily Amidah prayer. Though it remains unbuilt, the notion of and desire for a Third Temple is sacred in Judaism, particularly Orthodox Judaism, the prophets in the Tanakh called for its construction to be fulfilled prior to, or in tandem with, the Messianic age. The rebuilding of the Third Temple also plays a role in some interpretations of Christian eschatology. Architectural plans for the third Temple exist most notably in Chapters 40–47 of the Book of Ezekiel, Orthodox Judaism believes in the rebuilding of a Third Temple and the resumption of Korban, although there is disagreement about how rebuilding should take place. This belief is embedded in Orthodox Jewish prayer services, the generally accepted position among Orthodox Jews is that the full order of the sacrifices will be resumed upon the building of the Temple. Maimonides wrote in his philosophical treatise, A Guide for the Perplexed. However, in his Jewish legal code, the Mishneh Torah, he states that animal sacrifices will resume in the third temple, some attribute to Rabbi Abraham Isaac Kook the view that animal sacrifices will not be reinstituted. These views on the Temple service are sometimes misconstrued, the morning prayer service also includes a study session of the daily Temple ritual and offerings as a reminder, including detailed study of the animal sacrifices and incense offerings. The service also contains the daily and special-occasion psalms the Levites used to sing in the Temple, translations and commentary on prayers with this language tend to discuss both meanings in Orthodox Judaism. The laws of purity are directly based, in function and terminology. A number of requirements, such as the practices of immersing in a mikveh before Yom Kippur, washing the hands in the morning, before meals. Many contemporary and seemingly unconnected rules for living are intimately linked with these Temple rituals. In August 1967, after Israels capture of the Mount, Rabbi Shlomo Goren, Rabbi Goren was also well known for his controversial positions concerning Jewish sovereignty over the Temple Mount
17.
DOS
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None of these systems were officially named DOS, and indeed DOS is a general term for disk operating system. MS-DOS dominated the IBM PC compatible market between 1981 and 1995, and Microsoft Windows, still ran on top of it until about 2001, dozens of other operating systems also use the acronym DOS, including DOS/360 from 1966. Others are Apple DOS, Apple ProDOS, Atari DOS, Commodore DOS, TRSDOS, see List of DOS operating systems § Other operating systems. IBM PC DOS and its predecessor, 86-DOS, resembled Digital Researchs CP/M—the dominant disk operating system for 8-bit Intel 8080, DOS instead ran on Intel 8086 16-bit processors. Starting with MS-DOS1.28 and PC DOS2.0 the operating system incorporated various features inspired by Xenix, when IBM introduced the IBM PC, built with the Intel 8088 microprocessor, they needed an operating system. Seeking an 8088-compatible build of CP/M, IBM initially approached Microsoft CEO Bill Gates, IBM was sent to Digital Research, and a meeting was set up. However, the negotiations for the use of CP/M broke down, Digital Research wished to sell CP/M on a royalty basis, while IBM sought a single license. Digital Research founder Gary Kildall refused, and IBM withdrew, Gates in turn approached Seattle Computer Products. There, programmer Tim Paterson had developed a variant of CP/M-80, the system was initially named QDOS, before being made commercially available as 86-DOS. Microsoft purchased 86-DOS, allegedly for $50,000 and this became Microsoft Disk Operating System, MS-DOS, introduced in 1981. Within a year Microsoft licensed MS-DOS to over 70 other companies, Microsoft later required the use of the MS-DOS name, with the exception of the IBM variant. IBM continued to develop their version, PC DOS, for the IBM PC, Digital Research became aware that an operating system similar to CP/M was being sold by IBM, and threatened legal action. IBM responded by offering an agreement, they would give PC consumers a choice of PC DOS or CP/M-86, side-by-side, CP/M cost almost $200 more than PC DOS, and sales were low. CP/M faded, with MS-DOS and PC DOS becoming the operating system for PCs. Microsoft originally sold MS-DOS only to original equipment manufacturers, one major reason for this was that not all early PCs were 100% IBM PC compatible. DOS was structured such that there was a separation between the specific device driver code and the DOS kernel. Microsoft provided an OEM Adaptation Kit which allowed OEMs to customize the device driver code to their particular system, by the early 1990s, most PCs adhered to IBM PC standards so Microsoft began selling MS-DOS in retail with MS-DOS5.0. In the mid-1980s Microsoft developed a version of DOS
18.
Turbo C
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Turbo C is a discontinued Integrated Development Environment and compiler for the C programming language from Borland. First introduced in 1987, it was noted for its development environment, small size, fast compile speed, comprehensive manuals. In May 1990, Borland replaced Turbo C with Turbo C++, in 2006, Borland reintroduced the Turbo moniker. In the early 1980s, Borland enjoyed considerable success with their Turbo Pascal product, Borland followed up that success by releasing Turbo Basic, Turbo Prolog and Turbo C. Turbo C had the properties as Turbo Pascal, an integrated development environment, a fast compiler, a good editor. Turbo C was not as successful as the Pascal-sister product, first, C was a language for professional programming and systems development rather than a school language. Turbo C competed with other programming tools. Turbo C did, however, have advantages in speed of compiled code, large project support, version 1.0 offered the first integrated development environment for C on IBM PCs. Like many Borland products of the time, the software was bought from another company and it ran in 384 kB of memory. It allowed inline assembly with full access to C symbolic names and structures, supported all memory models, and offered optimizations for speed, size, constant folding, version 1.5 was an incremental improvement over version 1.0. It included more sample programs, improved manuals and bug fixes and it was shipped on five 360 KB diskettes of uncompressed files, and came with sample C programs, including a stripped down spreadsheet called mcalc. This version introduced the <conio. h> header file, version 2.0 featured the first blue screen version, which would be typical of all future Borland releases for MS-DOS. The American release did not have Turbo Assembler or a separate debugger, Turbo C, Asm, and Debugger were sold together as a suite. This seems to describe another release, Featured Turbo Debugger, Turbo Assembler, and this version of Turbo C was also released for the Atari ST, the program was not maintained by Borland, but sold and renamed PureC. With the release of Turbo C++1.0, the two products were folded into one and the name Turbo C was discontinued, the C++ compiler was developed under contract by a company in San Diego, and was one of the first true compilers for C++. In 2006, Borlands successor, Embarcadero Technologies, re-released Turbo C, BYTE in 1989 listed Turbo C and Turbo Pascal as among the Distinction winners of the BYTE Awards. Citing their user interface and continued emphasis on speed, the stated that for rapid prototyping theres not much better
19.
Commodore 64
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The Commodore 64, also known as the C64, C-64, C=64, or occasionally CBM64 or VIC-64 in Sweden, is an 8-bit home computer introduced in January 1982 by Commodore International. It is listed in the Guinness World Records as the single computer model of all time. Volume production started in early 1982, marketing in August for US$595, preceded by the Commodore VIC-20 and Commodore PET, the C64 took its name from its 64 kilobytes of RAM. It had superior sound and graphical specifications compared to earlier systems such as the Apple II and Atari 800, with multi-color sprites. The C64 dominated the low-end computer market for most of the 1980s. Sam Tramiel, a later Atari president and the son of Commodores founder, said in a 1989 interview, When I was at Commodore we were building 400,000 C64s a month for a couple of years. In the UK market, the C64 faced competition from the BBC Micro and the ZX Spectrum, part of the Commodore 64s success was its sale in regular retail stores instead of only electronics and/or computer hobbyist specialty stores. Commodore produced many of its parts in-house to control costs, including custom integrated circuit chips from MOS Technology and it has been compared to the Ford Model T automobile for its role in bringing a new technology to middle-class households via creative and affordable mass-production. Approximately 10,000 commercial software titles have made for the Commodore 64 including development tools, office productivity applications. C64 emulators allow anyone with a computer, or a compatible video game console. The C64 is also credited with popularizing the computer demoscene and is used today by some computer hobbyists. In 2008,17 years after it was taken off the market, in January 1981, MOS Technology, Inc. Commodores integrated circuit design subsidiary, initiated a project to design the graphic, Design work for the chips, named MOS Technology VIC-II and MOS Technology SID, was completed in November 1981. Commodore then began a game console project that would use the new chips—called the Ultimax or the Commodore MAX Machine and this project was eventually cancelled after just a few machines were manufactured for the Japanese market. At the same time, Robert Bob Russell and Robert Bob Yannes were critical of the current product line-up at Commodore, with the support of Al Charpentier and Charles Winterble, they proposed to Commodore CEO Jack Tramiel a true low-cost sequel to the VIC-20. Tramiel dictated that the machine should have 64 KB of random-access memory, although 64-Kbit dynamic random-access memory chips cost over US$100 at the time, he knew that DRAM prices were falling, and would drop to an acceptable level before full production was reached. The product was named the VIC-40 as the successor to the popular VIC-20. The team that constructed it consisted of Yash Terakura, Bob Russell, Bob Yannes, the design, prototypes and some sample software were finished in time for the show, after the team had worked tirelessly over both Thanksgiving and Christmas weekends
20.
C (programming language)
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C was originally developed by Dennis Ritchie between 1969 and 1973 at Bell Labs, and used to re-implement the Unix operating system. C has been standardized by the American National Standards Institute since 1989, C is an imperative procedural language. Therefore, C was useful for applications that had formerly been coded in assembly language. Despite its low-level capabilities, the language was designed to encourage cross-platform programming, a standards-compliant and portably written C program can be compiled for a very wide variety of computer platforms and operating systems with few changes to its source code. The language has become available on a wide range of platforms. In C, all code is contained within subroutines, which are called functions. Function parameters are passed by value. Pass-by-reference is simulated in C by explicitly passing pointer values, C program source text is free-format, using the semicolon as a statement terminator and curly braces for grouping blocks of statements. The C language also exhibits the characteristics, There is a small, fixed number of keywords, including a full set of flow of control primitives, for, if/else, while, switch. User-defined names are not distinguished from keywords by any kind of sigil, There are a large number of arithmetical and logical operators, such as +, +=, ++, &, ~, etc. More than one assignment may be performed in a single statement, function return values can be ignored when not needed. Typing is static, but weakly enforced, all data has a type, C has no define keyword, instead, a statement beginning with the name of a type is taken as a declaration. There is no function keyword, instead, a function is indicated by the parentheses of an argument list, user-defined and compound types are possible. Heterogeneous aggregate data types allow related data elements to be accessed and assigned as a unit, array indexing is a secondary notation, defined in terms of pointer arithmetic. Unlike structs, arrays are not first-class objects, they cannot be assigned or compared using single built-in operators, There is no array keyword, in use or definition, instead, square brackets indicate arrays syntactically, for example month. Enumerated types are possible with the enum keyword and they are not tagged, and are freely interconvertible with integers. Strings are not a data type, but are conventionally implemented as null-terminated arrays of characters. Low-level access to memory is possible by converting machine addresses to typed pointers
21.
BASIC
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BASIC is a family of general-purpose, high-level programming languages whose design philosophy emphasizes ease of use. In 1964, John G. Kemeny and Thomas E. Kurtz designed the original BASIC language at Dartmouth College in the U. S. state of New Hampshire and they wanted to enable students in fields other than science and mathematics to use computers. At the time, nearly all use of computers required writing custom software, versions of BASIC became widespread on microcomputers in the mid-1970s and 1980s. Microcomputers usually shipped with BASIC, often in the machines firmware, having an easy-to-learn language on these early personal computers allowed small business owners, professionals, hobbyists, and consultants to develop custom software on computers they could afford. In the 2010s, BASIC remains popular in many computing dialects and in new languages influenced by BASIC, before the mid-1960s, the only computers were huge mainframe computers. Users submitted jobs on punched cards or similar media to specialist computer operators, the computer stored these, then used a batch processing system to run this queue of jobs one after another, allowing very high levels of utilization of these expensive machines. As the performance of computing hardware rose through the 1960s, multi-processing was developed and this allowed a mix of batch jobs to be run together, but the real revolution was the development of time-sharing. The original BASIC language was released on May 1,1964 by John G. Kemeny and Thomas E. Kurtz, the acronym BASIC comes from the name of an unpublished paper by Thomas Kurtz. BASIC was designed to allow students to write computer programs for the Dartmouth Time-Sharing System. It was intended specifically for technical users who did not have or want the mathematical background previously expected. Being able to use a computer to support teaching and research was quite novel at the time, the language was based on FORTRAN II, with some influences from ALGOL60 and with additions to make it suitable for timesharing. Wanting use of the language to become widespread, its designers made the available free of charge. They also made it available to schools in the Hanover area. In the following years, as dialects of BASIC appeared, Kemeny. A version was a part of the Pick operating system from 1973 onward. During this period a number of computer games were written in BASIC. A number of these were collected by DEC employee David H. Ahl and he later collected a number of these into book form,101 BASIC Computer Games, published in 1973. During the same period, Ahl was involved in the creation of a computer for education use
22.
Mental health
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Mental health is a level of psychological well-being, or an absence of mental illness. It is the state of someone who is functioning at a satisfactory level of emotional and behavioral adjustment. Cultural differences, subjective assessments, and competing professional theories all affect how mental health is defined, a widely accepted definition of health by mental health specialists is psychoanalyst Sigmund Freuds definition, the capacity to work and to love. In the mid-19th century, William Sweetser was the first to coin the term mental hygiene, dorothea Dix was an important figure in the development of mental hygiene movement. Dix was a teacher who endeavored throughout her life to help people with mental disorders. This was known as the mental hygiene movement, emil Kraepelin in 1896 developed the taxonomy mental disorders which has dominated the field for nearly 80 years. Later the proposed model of abnormality was subjected to analysis. Mental illnesses are more common than cancer, diabetes, or heart disease, over 26 percent of all Americans over the age of 18 meet the criteria for having a mental illness. Serious mental disorders affect an estimated 6 percent of the adult population, a little more than half receive treatment. A WHO report estimates the global cost of illness at nearly $2.5 trillion in 2010. An individuals emotional health can also impact physical health and poor mental health can lead to such as substance abuse. Maintaining good mental health is crucial to living a long and healthy life, good mental health can enhance ones life, while poor mental health can prevent someone from living an enriching life. According to Richards, Campania, & Muse-Burke, There is growing evidence that is showing emotional abilities are associated with prosocial behaviors such as stress management and physical health. Their research also concluded that people who lack emotional expression are inclined to anti-social behaviors, Mental health can be seen as an unstable continuum, where an individuals mental health may have many different possible values. Mental wellness is generally viewed as an attribute, even if the person does not have any diagnosed mental health condition. This definition of mental health highlights emotional well-being, the capacity to live a full and creative life, some discussions are formulated in terms of contentment or happiness. Many therapeutic systems and self-help books offer methods and philosophies espousing strategies and techniques vaunted as effective for improving the mental wellness. Positive psychology is increasingly prominent in mental health, an example of a wellness model includes one developed by Myers, Sweeney and Witmer
23.
Atheism
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Atheism is, in the broadest sense, the absence of belief in the existence of deities. Less broadly, atheism is the rejection of belief that any deities exist, in an even narrower sense, atheism is specifically the position that there are no deities. Atheism is contrasted with theism, which, in its most general form, is the belief that at least one deity exists, the etymological root for the word atheism originated before the 5th century BCE from the ancient Greek ἄθεος, meaning without god. The term denoted a social category created by orthodox religionists into which those who did not share their religious beliefs were placed, the actual term atheism emerged first in the 16th century. With the spread of freethought, skeptical inquiry, and subsequent increase in criticism of religion, application of the term narrowed in scope, the first individuals to identify themselves using the word atheist lived in the 18th century during the Age of Enlightenment. The French Revolution, noted for its unprecedented atheism, witnessed the first major movement in history to advocate for the supremacy of human reason. Arguments for atheism range from the philosophical to social and historical approaches, although some atheists have adopted secular philosophies, there is no one ideology or set of behaviors to which all atheists adhere. Since conceptions of atheism vary, accurate estimations of current numbers of atheists are difficult, an older survey by the British Broadcasting Corporation in 2004 recorded atheists as comprising 8% of the worlds population. Other older estimates have indicated that atheists comprise 2% of the worlds population, according to these polls, Europe and East Asia are the regions with the highest rates of atheism. In 2015, 61% of people in China reported that they were atheists, the figures for a 2010 Eurobarometer survey in the European Union reported that 20% of the EU population claimed not to believe in any sort of spirit, God or life force. Atheism has been regarded as compatible with agnosticism, and has also been contrasted with it, a variety of categories have been used to distinguish the different forms of atheism. Some of the ambiguity and controversy involved in defining atheism arises from difficulty in reaching a consensus for the definitions of words like deity, the plurality of wildly different conceptions of God and deities leads to differing ideas regarding atheisms applicability. The ancient Romans accused Christians of being atheists for not worshiping the pagan deities, gradually, this view fell into disfavor as theism came to be understood as encompassing belief in any divinity. Definitions of atheism also vary in the degree of consideration a person must put to the idea of gods to be considered an atheist, Atheism has sometimes been defined to include the simple absence of belief that any deities exist. This broad definition would include newborns and other people who have not been exposed to theistic ideas, as far back as 1772, Baron dHolbach said that All children are born Atheists, they have no idea of God. Similarly, George H. Smith suggested that, The man who is unacquainted with theism is an atheist because he does not believe in a god. This category would include the child with the conceptual capacity to grasp the issues involved. The fact that this child does not believe in god qualifies him as an atheist, ernest Nagel contradicts Smiths definition of atheism as merely absence of theism, acknowledging only explicit atheism as true atheism
24.
Display resolution
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The display resolution or display modes of a digital television, computer monitor or display device is the number of distinct pixels in each dimension that can be displayed. It is usually quoted as width × height, with the units in pixels, for example,1024 ×768 means the width is 1024 pixels and this example would normally be spoken as ten twenty-four by seven sixty-eight or ten twenty-four by seven six eight. A consequence of having a display is that, for multi-format video inputs. Note that for broadcast television standards the use of the word here is a misnomer. In digital measurement, the resolution would be given in pixels per inch. In analog measurement, if the screen is 10 inches high, in the case of television inputs, many manufacturers will take the input and zoom it out to overscan the display by as much as 5% so input resolution is not necessarily display resolution. The eyes perception of display resolution can be affected by a number of factors – see image resolution, one factor is the display screens rectangular shape, which is expressed as the ratio of the physical picture width to the physical picture height. This is known as the aspect ratio, a screens physical aspect ratio and the individual pixels aspect ratio may not necessarily be the same. An array of 1280 ×720 on a 16,9 display has square pixels, an example of pixel shape affecting resolution or perceived sharpness, displaying more information in a smaller area using a higher resolution makes the image much clearer or sharper. Most television display manufacturers overscan the pictures on their displays, so that the effective on-screen picture may be reduced from 720 ×576 to 680 ×550, the size of the invisible area somewhat depends on the display device. HD televisions do this as well, to a similar extent, Computer displays including projectors generally do not overscan although many models allow it. CRT displays tend to be underscanned in stock configurations, to compensate for the distortions at the corners. As of July 2002,1024 ×768 eXtended Graphics Array was the most common display resolution, many web sites and multimedia products were re-designed from the previous 800 ×600 format to the layouts optimized for 1024 ×768. The availability of inexpensive LCD monitors has made the 5,4 aspect ratio resolution of 1280 ×1024 more popular for desktop usage during the first decade of the 21st century. Many computer users including CAD users, graphic artists and video game players ran their computers at 1600 ×1200 resolution or higher such as 2048 ×1536 QXGA if they had the necessary equipment. A new more-than-HD resolution of 2560 ×1600 WQXGA was released in 30-inch LCD monitors in 2007, as of March 2012,1366 ×768 was the most common display resolution. In 2010, 27-inch LCD monitors with the 2560 × 1440-pixel resolution were released by manufacturers including Apple. Panels for professional environments, such as use and air traffic control
25.
Computer monitor
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A computer monitor or a computer display is an electronic visual display for computers. A monitor usually comprises the display device, circuitry, casing, the display device in modern monitors is typically a thin film transistor liquid crystal display or a flat panel LED display, while older monitors used a cathode ray tubes. It can be connected to the computer via VGA, DVI, HDMI, DisplayPort, Thunderbolt, LVDS or other proprietary connectors, originally, computer monitors were used for data processing while television receivers were used for entertainment. From the 1980s onwards, computers have used for both data processing and entertainment, while televisions have implemented some computer functionality. The common aspect ratio of televisions, and computer monitors, has changed from 4,3 to 16,10, to 16,9. Early electronic computers were fitted with a panel of light bulbs where the state of each particular bulb would indicate the state of a particular register bit inside the computer. This allowed the operating the computer to monitor the internal state of the machine. As early monitors were only capable of displaying a limited amount of information. Instead, a printer was the primary output device, while the monitor was limited to keeping track of the programs operation. Multiple technologies have used for computer monitors. Until the 21st century most used cathode ray tubes but they have largely superseded by LCD monitors. The first computer monitors used cathode ray tubes, high-resolution CRT displays were developed for specialized military, industrial and scientific applications but they were far too costly for general use. Either computer could be connected to the terminals of an ordinary color TV set or used with a purpose-made CRT color monitor for optimum resolution. In 1984 IBM introduced the Enhanced Graphics Adapter which was capable of producing 16 colors and had a resolution of 640 x 350, by the end of the 1980s color CRT monitors that could clearly display 1024 x 768 pixels were widely available and increasingly affordable. During the following decade maximum display resolutions gradually increased and prices continued to fall, CRT technology remained dominant in the PC monitor market into the new millennium partly because it was cheaper to produce and offered viewing angles close to 180 degrees. CRTs still offer some image quality advantages over LCDs but improvements to the latter have made much less obvious. There are multiple technologies that have used to implement liquid crystal displays. Commonly, the laptop would be offered with an assortment of display options at increasing price points, monochrome
26.
C++
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C++ is a general-purpose programming language. It has imperative, object-oriented and generic programming features, while also providing facilities for low-level memory manipulation and it was designed with a bias toward system programming and embedded, resource-constrained and large systems, with performance, efficiency and flexibility of use as its design highlights. C++ is a language, with implementations of it available on many platforms and provided by various organizations, including the Free Software Foundation, LLVM, Microsoft, Intel. C++ is standardized by the International Organization for Standardization, with the latest standard version ratified and published by ISO in December 2014 as ISO/IEC14882,2014. The C++ programming language was standardized in 1998 as ISO/IEC14882,1998. The current C++14 standard supersedes these and C++11, with new features, the C++17 standard is due in 2017, with the draft largely implemented by some compilers already, and C++20 is the next planned standard thereafter. Many other programming languages have influenced by C++, including C#, D, Java. In 1979, Bjarne Stroustrup, a Danish computer scientist, began work on C with Classes, the motivation for creating a new language originated from Stroustrups experience in programming for his Ph. D. thesis. When Stroustrup started working in AT&T Bell Labs, he had the problem of analyzing the UNIX kernel with respect to distributed computing, remembering his Ph. D. experience, Stroustrup set out to enhance the C language with Simula-like features. C was chosen because it was general-purpose, fast, portable, as well as C and Simulas influences, other languages also influenced C++, including ALGOL68, Ada, CLU and ML. Initially, Stroustrups C with Classes added features to the C compiler, Cpre, including classes, derived classes, strong typing, inlining, furthermore, it included the development of a standalone compiler for C++, Cfront. In 1985, the first edition of The C++ Programming Language was released, the first commercial implementation of C++ was released in October of the same year. In 1989, C++2.0 was released, followed by the second edition of The C++ Programming Language in 1991. New features in 2.0 included multiple inheritance, abstract classes, static functions, const member functions. In 1990, The Annotated C++ Reference Manual was published and this work became the basis for the future standard. Later feature additions included templates, exceptions, namespaces, new casts, after a minor C++14 update released in December 2014, various new additions are planned for 2017 and 2020. According to Stroustrup, the name signifies the nature of the changes from C. This name is credited to Rick Mascitti and was first used in December 1983, when Mascitti was questioned informally in 1992 about the naming, he indicated that it was given in a tongue-in-cheek spirit
27.
ASCII
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ASCII, abbreviated from American Standard Code for Information Interchange, is a character encoding standard. ASCII codes represent text in computers, telecommunications equipment, and other devices, most modern character-encoding schemes are based on ASCII, although they support many additional characters. ASCII was developed from telegraph code and its first commercial use was as a seven-bit teleprinter code promoted by Bell data services. Work on the ASCII standard began on October 6,1960, the first edition of the standard was published in 1963, underwent a major revision during 1967, and experienced its most recent update during 1986. Compared to earlier telegraph codes, the proposed Bell code and ASCII were both ordered for more convenient sorting of lists, and added features for other than teleprinters. Originally based on the English alphabet, ASCII encodes 128 specified characters into seven-bit integers as shown by the ASCII chart above. The characters encoded are numbers 0 to 9, lowercase letters a to z, uppercase letters A to Z, basic punctuation symbols, control codes that originated with Teletype machines, for example, lowercase j would become binary 1101010 and decimal 106. ASCII includes definitions for 128 characters,33 are non-printing control characters that affect how text and space are processed and 95 printable characters, of these, the IANA encourages use of the name US-ASCII for Internet uses of ASCII. The ASA became the United States of America Standards Institute and ultimately the American National Standards Institute, there was some debate at the time whether there should be more control characters rather than the lowercase alphabet. The X3.2.4 task group voted its approval for the change to ASCII at its May 1963 meeting, the X3 committee made other changes, including other new characters, renaming some control characters and moving or removing others. ASCII was subsequently updated as USAS X3. 4-1967, then USAS X3. 4-1968, ANSI X3. 4-1977 and they proposed a 9-track standard for magnetic tape, and attempted to deal with some punched card formats. The X3.2 subcommittee designed ASCII based on the earlier teleprinter encoding systems, like other character encodings, ASCII specifies a correspondence between digital bit patterns and character symbols. This allows digital devices to communicate each other and to process, store. Before ASCII was developed, the encodings in use included 26 alphabetic characters,10 numerical digits, ITA2 were in turn based on the 5-bit telegraph code Émile Baudot invented in 1870 and patented in 1874. The committee debated the possibility of a function, which would allow more than 64 codes to be represented by a six-bit code. In a shifted code, some character codes determine choices between options for the character codes. It allows compact encoding, but is reliable for data transmission. The standards committee decided against shifting, and so ASCII required at least a seven-bit code, the committee considered an eight-bit code, since eight bits would allow two four-bit patterns to efficiently encode two digits with binary-coded decimal
28.
Video Graphics Array
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Video Graphics Array is the display hardware first introduced with the IBM PS/2 line of computers in 1987. Today, the VGA analog interface is used for high definition video, including resolutions of 1080p, while the transmission bandwidth of VGA is high enough to support even higher resolution playback, there can be picture quality degradation depending on cable quality and length. How discernible this degradation is depends on the individuals eyesight and the display, though it is noticeable when switching to. The VGA supports both All Points Addressable graphics modes, and alphanumeric text modes, the other color modes defaulted to standard EGA or CGA compatible palettes, but could still be redefined if desired using VGA-specific programming. g. 400×600 or 360×480, and thin pixels,16 colors and the 70 Hz refresh rate with e. g. 736×410 mode. Its single-chip implementation allowed the VGA to be placed directly on a PC′s motherboard with a minimum of difficulty, since it only required video memory, timing crystals, the original VGA specifications are as follows,256 KB Video RAM 16-color and 256-color paletted display modes. 262, 144-color global palette Selectable 25.175 MHz or 28.322 MHz master pixel clock Usual line rate fixed at 31, compatibility is almost full at BIOS level, but even at register level, a very high value of compatibility is reached. The formula for the VGA horizontal frequency is thus ×525 kHz =4500 ÷143 kHz ≈31.4685 kHz, All other frequencies used by the VGA card are derived from this value by integer multiplication or division. Since the exactness of quartz oscillators is limited, real cards will have higher or lower frequency. All derived VGA timings can be varied widely by software that bypasses the VGA firmware interface and communicates directly with the VGA hardware, the use of other timings may in fact damage such monitors and thus was usually avoided by software publishers. For the most common VGA mode, the timings are. The figures shown in this image may be inaccurate and not match the above table exactly. The same general layout applies, merely at a lower frequency and these timings are the same in the higher frequency mode, but all pixel counts are correspondingly multiplied by 9/8ths – thus,720 active pixels,900 total per line, and a 54 pixel back porch. The monitor is triggered into synchronising at the higher frame rate by use of a positive-polarity VSync pulse. Depending on manufacturer, the details of active period and front/back porch widths, particularly in the horizontal domain. 640×400 @70 Hz is traditionally the video used for booting most VGA-compatible x86 personal computers which show a graphical boot screen. 640×480 @60 Hz is the default Windows graphics mode, up to Windows 2000 and it remains an option in XP and later versions via the boot menu low resolution video option and per-application compatibility mode settings. 320×200 @70 Hz is the most common mode for VGA-era PC games, using exactly the same timings as the 640×400 mode, the actual timings vary slightly from the defined standard
29.
Computer keyboard
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In computing, a computer keyboard is a typewriter-style device which uses an arrangement of buttons or keys to act as a mechanical lever or electronic switch. Following the decline of punch cards and paper tape, interaction via teleprinter-style keyboards became the input device for computers. A keyboard typically has characters engraved or printed on the keys, however, to produce some symbols requires pressing and holding several keys simultaneously or in sequence. While most keyboard keys produce letters, numbers or signs, other keys or simultaneous key presses can produce actions or execute computer commands. In normal usage, the keyboard is used as a text entry interface to type text and numbers into a word processor, in a modern computer, the interpretation of key presses is generally left to the software. A computer keyboard distinguishes each physical key from every other and reports all key presses to the controlling software, Keyboards are also used for computer gaming, either with regular keyboards or by using keyboards with special gaming features, which can expedite frequently used keystroke combinations. A keyboard is used to give commands to the operating system of a computer, such as Windows Control-Alt-Delete combination. A command-line interface is a type of user interface operated entirely through a keyboard and it was through such devices that modern computer keyboards inherited their layouts. Earlier models were developed separately by individuals such as Royal Earl House, earlier, Herman Hollerith developed the first keypunch devices, which soon evolved to include keys for text and number entry akin to normal typewriters by the 1930s. From the 1940s until the late 1960s, typewriters were the means of data entry. The keyboard remained the primary, most integrated computer peripheral well into the era of personal computing until the introduction of the mouse as a device in 1984. By this time, text-only user interfaces with sparse graphics gave way to comparatively graphics-rich icons on screen, One factor determining the size of a keyboard is the presence of duplicate keys, such as a separate numeric keyboard, for convenience. A keyboard with few keys is called a keypad, another factor determining the size of a keyboard is the size and spacing of the keys. Reduction is limited by the consideration that the keys must be large enough to be easily pressed by fingers. Alternatively a tool is used for pressing small keys, standard alphanumeric keyboards have keys that are on three-quarter inch centers, and have a key travel of at least 0.150 inches. Desktop computer keyboards, such as the 101-key US traditional keyboards or the 104-key Windows keyboards, include characters, punctuation symbols, numbers. The internationally common 102/104 key keyboards have a left shift key. Also the enter key is usually shaped differently, computer keyboards are similar to electric-typewriter keyboards but contain additional keys, such as the command or Windows keys
30.
Computer mouse
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A computer mouse is a pointing device that detects two-dimensional motion relative to a surface. This motion is typically translated into the motion of a pointer on a display, physically, a mouse consists of an object held in ones hand, with one or more buttons. Mice often also other elements, such as touch surfaces and wheels. The earliest known publication of the mouse as referring to a computer pointing device is in Bill Englishs July 1965 publication. The plural for the rodent is always mice in modern usage. The plural of a mouse is mouses and mice according to most dictionaries. The first recorded usage is mice, the online Oxford Dictionaries cites a 1984 use. The trackball, a pointing device, was invented in 1944 by Ralph Benjamin as part of a World War II-era fire-control radar plotting system called Comprehensive Display System. Benjamin was then working for the British Royal Navy Scientific Service, Benjamins project used analog computers to calculate the future position of target aircraft based on several initial input points provided by a user with a joystick. Benjamin felt that a more elegant input device was needed and invented what they called a ball for this purpose. The device was patented in 1947, but only a prototype using a ball rolling on two rubber-coated wheels was ever built, and the device was kept as a military secret. Another early trackball was built by British electrical engineer Kenyon Taylor in collaboration with Tom Cranston, Taylor was part of the original Ferranti Canada, working on the Royal Canadian Navys DATAR system in 1952. DATAR was similar in concept to Benjamins display, the trackball used four disks to pick up motion, two each for the X and Y directions. When the ball was rolled, the pickup discs spun and contacts on their outer rim made periodic contact with wires, by counting the pulses, the physical movement of the ball could be determined. A digital computer calculated the tracks and sent the data to other ships in a task force using pulse-code modulation radio signals. This trackball used a standard Canadian five-pin bowling ball and it was not patented, since it was a secret military project. Douglas Engelbart of the Stanford Research Institute has been credited in published books by Thierry Bardini, Paul Ceruzzi, Howard Rheingold, Engelbart was also recognized as such in various obituary titles after his death in July 2013. That November, while attending a conference on computer graphics in Reno, Nevada, Engelbart began to ponder how to adapt the underlying principles of the planimeter to X-Y coordinate input
31.
Integrated development environment
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An integrated development environment is a software application that provides comprehensive facilities to computer programmers for software development. An IDE normally consists of a code editor, build automation tools. Most modern IDEs have intelligent code completion, some IDEs, such as NetBeans and Eclipse, contain a compiler, interpreter, or both, others, such as SharpDevelop and Lazarus, do not. The boundary between an integrated development environment and other parts of the software development environment is not well-defined. Sometimes a version control system, or various tools to simplify the construction of a Graphical User Interface, are integrated, many modern IDEs also have a class browser, an object browser, and a class hierarchy diagram, for use in object-oriented software development. Integrated development environments are designed to maximize programmer productivity by providing tight-knit components with similar user interfaces, IDEs present a single program in which all development is done. This program typically provides many features for authoring, modifying, compiling, deploying and debugging software and this contrasts with software development using unrelated tools, such as vi, GCC or make. One aim of the IDE is to reduce the necessary to piece together multiple development utilities. Reducing that setup time can increase productivity, in cases where learning to use the IDE is faster than manually integrating all of the individual tools. Tighter integration of all development tasks has the potential to improve overall productivity beyond just helping with setup tasks, for example, code can be continuously parsed while it is being edited, providing instant feedback when syntax errors are introduced. That can speed learning a new programming language and its associated libraries, some IDEs are dedicated to a specific programming language, allowing a feature set that most closely matches the programming paradigms of the language. However, there are many multiple-language IDEs, while most modern IDEs are graphical, text-based IDEs such as Turbo Pascal were in popular use before the widespread availability of windowing systems like Microsoft Windows and the X Window System. They commonly use function keys or hotkeys to execute frequently used commands or macros, IDEs initially became possible when developing via a console or terminal. Early systems could not support one, since programs were prepared using flowcharts, dartmouth BASIC was the first language to be created with an IDE. Its IDE was command-based, and therefore did not look much like the menu-driven, however it integrated editing, file management, compilation, debugging and execution in a manner consistent with a modern IDE. Maestro I is a product from Softlab Munich and was the worlds first integrated development environment for software, Maestro I was installed for 22,000 programmers worldwide. Until 1989,6,000 installations existed in the Federal Republic of Germany, Maestro was arguably the world leader in this field during the 1970s and 1980s. Today one of the last Maestro I can be found in the Museum of Information Technology at Arlington, one of the first IDEs with a plug-in concept was Softbench
32.
Vice (magazine)
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Vice is a print magazine and website focused on arts, culture, and news topics. As of February 2015, the magazines Chief Creative Officer was Eddy Moretti, Andrew Creighton is President, as of October 2014, there were 29 Vice offices on every continent except Africa and Antarctica. The monthly publication is frequently focused on a single theme, when the editors later sought to dissolve their commitments with the original publisher Alix Laurent, they bought him out and changed the name to Vice in 1996. Richard Szalwinski, a Canadian software millionaire, acquired the magazine and relocated the operation to New York City, following the relocation, the magazine quickly developed a reputation for provocative and politically incorrect content. Under Szalwinskis ownership, a few stores were opened in New York City. However, due to the end of the bubble, the three founders eventually regained ownership of the Vice brand, followed by the closure of the stores. The British edition of Vice was launched in 2002 and Andy Capper was its first editor. The media company was based in New York City, but the magazine began featuring articles on topics that were considered more serious, such as armed conflict in Iraq. Alvi explained to The New York Times in November 2007, The world is bigger than the Lower East Side. McInnes left the publication in 2008, citing creative differences as the primary issue, in an email communication dated 23 January, McInnes explained, I no longer have anything to do with Vice or VBS or DOs & DONTs or any of that. Its a long story but weve all agreed to leave it at creative differences, at the commencement of 2012, an article in Forbes magazine referred to the Vice company as Vice Media, but the precise time when this title development occurred is not public knowledge. Vice acquired the fashion magazine i-D in December 2012 and, by February 2013, Vice produced 24 global editions of the magazine, by this stage, Alex Miller had replaced Capper as the editor-in-chief of the UK edition. Furthermore, Vice consisted of 800 worldwide employees, including 100 in London, Vice magazine includes the work of journalists, columnists, fiction writers, graphic artists and cartoonists, and photographers. Both Vices online and magazine content has shifted from dealing mostly with independent arts, articles on the site feature a range of subjects, often things not covered as by mainstream media. Entire issues of the magazine have also dedicated to the concerns of Iraqi people, Native Americans, Russian people, people with mental disorders. Vice also publishes a guide for students in the United Kingdom. In 2007, a Vice announcement was published on the Internet, After umpteen years of putting out what amounted to a book every month. Besides, too many other magazines have ripped it and started doing their own take on themes
33.
Tom's Hardware
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Toms Hardware is an online publication owned by Purch Group and focused on technology. It was founded in 1996 by Thomas Pabst and it provides articles, news, price comparisons, videos and reviews on computer hardware and high technology. The site features coverage on CPUs, motherboards, RAM, graphics and displays, storage, Toms Hardware has a forum and featured blogs. A unique aspect of Toms Hardware is the Build Your Own section where readers can learn how to build their own computers and it is published in several languages. April 1996 – Website founded in the United States by the German medical doctor Thomas Pabst, august 1998 – The company publishes a hardware book in cooperation with Macmillan Publishers. March 1999 – Establishes testing lab in Pleasanton, California, United States, october 1999 – Set up of Toms Guides Publishing AG in Germany. June 2003 – Italian website goes live, april 2007 – TG Publishing, parent company of Toms Hardware, is acquired by the French company Bestofmedia Group. May 2007 – Toms Hardware and iRobot launch a contest for aspiring roboticists, september 2007 – Company rebrands TwitchGuru to Toms Games and Gear Digest to Toms Guide. February 2008 – Presence-PC become the French version of Toms Hardware, november 2008 – Toms Hardware launches first worldwide overclocking championship. August 2010 – AfterDawn launch Toms Hardware in Finland, july 2013 - Bestofmedia Group, the parent company of Toms Hardware, is acquired by TechMediaNetwork, Inc. April 2014 - TechMediaNetwork, the parent company of Toms Hardware, anandtech CNET The Tech Report List of Internet forums Official website
34.
Slate (magazine)
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Slate is an online liberal / progressive magazine that covers current affairs, politics and culture in the United States. It was created in 1996 by former New Republic editor Michael Kinsley, on 21 December 2004, it was purchased by The Washington Post Company, later renamed the Graham Holdings Company. Since 4 June 2008, Slate has been managed by The Slate Group, Slate is based in New York City, with an additional office in Washington, DC. A French version was launched in February 2009 by a group of four journalists, including Jean-Marie Colombani, Eric Leser, among them, the founders hold 50% in the publishing company, while The Slate Group holds 15%. In 2011, slate. fr started a separate site covering African news, Slate Afrique, in July 2014, Julia Turner replaced David Plotz, who had been editor of Slate since 2008. Plotz had been the deputy editor to Jacob Weisberg, Slates editor from 2002 until his designation as the Chairman, the Washington Post Companys John Alderman is Slates publisher. Slate, which is updated throughout the day, covers politics, arts and culture, sports, as of mid-2015, it publishes about 1500 stories per month. Slate is also known for adopting contrarian views, giving rise to the term Slate Pitches and it is ad-supported and has been available to read free of charge since 1999, but restricted access for non-US readers via a metered paywall in 2015. Slate features regular and semi-regular columns such as Explainer, Moneybox, Spectator, Transport, many of the articles are short and argument-driven. Around 2010, the magazine began running long-form journalism. Many of the stories are an outgrowth of the Fresca Fellowships. In the context of a 2014 reader discussion, it was stated that the magazine is perceived to have left-liberal leanings, in 1998, Slate introduced a paywall-based business model that attracted up 20,000 subscribers but was abandoned afterwards. A similar subscription model would later be implemented by Slates independently owned competitor, Salon. com, on November 30,2005, Slate started a daily feature ”Todays Pictures”, featuring fifteen to twenty photographs from the archive at Magnum Photos that share a common theme. The column also features two flash animated ”Interactive Essays” a month, in June 2006, on its tenth anniversary, Slate unveiled a redesigned website. In 2007, it introduced Slate V, a video magazine with content that relates to or expands upon their written articles. In 2013, the magazine was redesigned under the guidance of Design Director Vivian Selbo, in 2011, Slate was nominated for four digital National Magazine Awards and won the NMA for General Excellence. In the same year, the laid off several high-profile journalists, including co-founder Jack Shafer. At the time, it had around 40 full-time editorial staff, the following year, a dedicated ad sales team was created
