1.
Saint Paul, Minnesota
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Saint Paul is the capital and second-most populous city of the U. S. state of Minnesota. As of 2015, the estimated population was 300,851. Saint Paul is the county seat of Ramsey County, the smallest and most densely populated county in Minnesota. The city lies mostly on the east bank of the Mississippi River in the area surrounding its point of confluence with the Minnesota River, and adjoins Minneapolis, the states largest city. Known as the Twin Cities, the two form the core of Minneapolis–Saint Paul, the 16th-largest metropolitan area in the United States, with about 3.52 million residents. Founded near historic Native American settlements as a trading and transportation center, the Dakota name for Saint Paul is Imnizaska. Though Minneapolis is better-known nationally, Saint Paul contains the state government, regionally, the city is known for the Xcel Energy Center, home of the Minnesota Wild, and for the Science Museum of Minnesota. As a business hub of the Upper Midwest, it is the headquarters of such as Ecolab. Saint Paul, along with its Twin City, Minneapolis, is known for its literacy rate. It was the city in the United States with a population of 250,000 or more to see an increase in circulation of Sunday newspapers in 2007. The settlement originally began at present-day Lamberts Landing, but was known as Pigs Eye after Pierre Pigs Eye Parrant established a tavern there. Burial mounds in present-day Indian Mounds Park suggest that the area was inhabited by the Hopewell Native Americans about two thousand years ago. From the early 17th century until 1837, the Mdewakanton Dakota and they called the area I-mni-za ska dan for its exposed white sandstone cliffs. Following the Louisiana Purchase in 1803, a U. S. Army officer named Zebulon Pike negotiated approximately 100,000 acres of land from the local Dakota tribes in 1805 in order to establish a fort. The negotiated territory was located on banks of the Mississippi River, starting from Saint Anthony Falls in present-day Minneapolis, to its confluence with the Saint Croix River. Fort Snelling was built on the territory in 1819 at the confluence of the Mississippi and Minnesota Rivers, the 1837 Treaty with the Sioux ceded all local tribal land east of the Mississippi to the U. S. Government. Taoyateduta moved his band at Kaposia across the river to the south, fur traders, explorers, and missionaries came to the area for the forts protection. Many of the settlers were French-Canadians who lived nearby, however, as a whiskey trade flourished, military officers banned settlers from the fort-controlled lands
2.
Programmer
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A programmer, computer programmer, developer, dev, coder, or software engineer is a person who writes computer software. The term computer programmer can refer to a specialist in one area of programming or to a generalist who writes code for many kinds of software. One who practices or professes a formal approach to programming may also be known as a programmer analyst, a programmers primary computer language is often prefixed to these titles, and those who work in a web environment often prefix their titles with web. The use of the term programmer for these positions is sometimes considered an insulting or derogatory oversimplification. Because Babbages machine was never completed to a standard in her time. The first person to run a program on a functioning modern electronically based computer was computer scientist Konrad Zuse, the ENIAC programming team, consisting of Kay McNulty, Betty Jennings, Betty Snyder, Marlyn Wescoff, Fran Bilas and Ruth Lichterman were the first regularly working programmers. International Programmers Day is celebrated annually on 7 January, in 2009, the government of Russia decreed a professional annual holiday known as Programmers Day to be celebrated on 13 September. It had also been an international holiday before that. Some of this section is from the Occupational Outlook Handbook, 2006–07 Edition, Computer programmers write, test, debug, and maintain the detailed instructions, called computer programs, that computers must follow to perform their functions. Programmers also conceive, design, and test logical structures for solving problems by computer, job titles and descriptions may vary, depending on the organization. Programmers work in many settings, including corporate information technology departments, big companies, small service firms. Many professional programmers also work for consulting companies at client sites as contractors, licensing is not typically required to work as a programmer, although professional certifications are commonly held by programmers. Programming is widely considered a profession, Programmers work varies widely depending on the type of business for which they are writing programs. For example, the involved in updating financial records are very different from those required to duplicate conditions on an aircraft for pilots training in a flight simulator. In most cases, several work together as a team under a senior programmer’s supervision. Programmers write programs according to the specifications determined primarily by more senior programmers, after the design process is complete, it is the job of the programmer to convert that design into a logical series of instructions that the computer can follow. The programmer codes these instructions in one of many programming languages, different programming languages are used depending on the purpose of the program. COBOL, for example, is used for business applications that typically run on mainframe and midrange computers, whereas Fortran is used in science
3.
Free software
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The right to study and modify software entails availability of the software source code to its users. This right is conditional on the person actually having a copy of the software. Richard Stallman used the existing term free software when he launched the GNU Project—a collaborative effort to create a freedom-respecting operating system—and the Free Software Foundation. The FSFs Free Software Definition states that users of software are free because they do not need to ask for permission to use the software. Free software thus differs from proprietary software, such as Microsoft Office, Google Docs, Sheets, and Slides or iWork from Apple, which users cannot study, change, freeware, which is a category of freedom-restricting proprietary software that does not require payment for use. For computer programs that are covered by law, software freedom is achieved with a software license. Software that is not covered by law, such as software in the public domain, is free if the source code is in the public domain. Proprietary software, including freeware, use restrictive software licences or EULAs, Users are thus prevented from changing the software, and this results in the user relying on the publisher to provide updates, help, and support. This situation is called vendor lock-in, Users often may not reverse engineer, modify, or redistribute proprietary software. Other legal and technical aspects, such as patents and digital rights management may restrict users in exercising their rights. Free software may be developed collaboratively by volunteer computer programmers or by corporations, as part of a commercial, from the 1950s up until the early 1970s, it was normal for computer users to have the software freedoms associated with free software, which was typically public domain software. Software was commonly shared by individuals who used computers and by manufacturers who welcomed the fact that people were making software that made their hardware useful. Organizations of users and suppliers, for example, SHARE, were formed to exchange of software. As software was written in an interpreted language such as BASIC. Software was also shared and distributed as printed source code in computer magazines and books, in United States vs. IBM, filed January 17,1969, the government charged that bundled software was anti-competitive. While some software might always be free, there would henceforth be an amount of software produced primarily for sale. In the 1970s and early 1980s, the industry began using technical measures to prevent computer users from being able to study or adapt the software as they saw fit. In 1980, copyright law was extended to computer programs, Software development for the GNU operating system began in January 1984, and the Free Software Foundation was founded in October 1985
4.
FreeDOS
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FreeDOS is a free operating system for IBM PC compatible computers. It intends to provide a complete DOS-compatible environment for running legacy software, FreeDOS can be booted from a floppy disk or USB flash drive. It is designed to run well under virtualization or x86 emulation, unlike MS-DOS, FreeDOS is composed of Free Software and open-source software, licensed under the terms of the GNU General Public License. Therefore, its distribution does not require license fees or royalties. However, other packages which form part of the FreeDOS project include non-GPL software considered worth preserving, such as 4DOS, the FreeDOS project began 29 June 1994, after Microsoft announced it would no longer sell or support MS-DOS. Jim Hall who at the time was a student posted a manifesto proposing the development of an open-source replacement, within a few weeks, other programmers including Pat Villani and Tim Norman joined the project. Between them, a kernel, the COMMAND. COM command line interpreter, there have been many official pre-release distributions of FreeDOS before the final FreeDOS1.0 distribution. GNU/DOS, a distribution of FreeDOS, was discontinued after version 1.0 was released. The legacy version 1.0 consisted of two CDs, one of which was an 8MB install CD targeted at regular users and the other which was a larger 49MB live CD that also held the source code of the project. FreeDOS is used by companies, Dell preloads FreeDOS with their n-series desktops to reduce their cost. The firm has been criticized for making these machines no cheaper, HP provides FreeDOS as an option in its dc5750 desktops, Mini 5101 netbooks and Probook laptops. FreeDOS is also used as media for updating the BIOS firmware in HP systems. GRCs SpinRite 6, a hard drive maintenance and recovery program, intels Solid-State Drive Firmware Update Tool loads the FreeDOS kernel. FreeDOS is also used in independent projects, FUZOMA is a FreeDOS-based distribution that can boot from a floppy disk. FED-UP is the Floppy Enhanced DivX Universal Player, FreeDOS itself requires a PC/XT machine with at least 640kB of memory. Programs not bundled with FreeDOS often require additional system resources, FreeDOS is mostly compatible with MS-DOS. It supports COM executables, standard DOS executables and Borlands 16-bit DPMI executables and it is also possible to run 32-bit DPMI executables using DOS extenders. Furthermore, with use of HX DOS Extender, many Win32 console applications function properly in FreeDOS, as do some rare GUI programs, like QEMU, FreeDOS is able to run Microsoft Windows 1.0 and 2.0 releases
5.
MS-DOS
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MS-DOS is a discontinued operating system for x86-based personal computers mostly developed by Microsoft. MS-DOS resulted from a request in 1981 by IBM for a system to use in its IBM PC range of personal computers. Microsoft quickly bought the rights to 86-DOS from Seattle Computer Products, IBM licensed and released it in August 1981 as PC DOS1.0 for use in their PCs. During its life, several competing products were released for the x86 platform and it was also the underlying basic operating system on which early versions of Windows ran as a GUI. It is a operating system, and consumes negligible installation space. MS-DOS was a form of 86-DOS – owned by Seattle Computer Products. This first version was shipped in August 1980, Microsoft, which needed an operating system for the IBM Personal Computer hired Tim Paterson in May 1981 and bought 86-DOS1.10 for $75,000 in July of the same year. Microsoft kept the number, but renamed it MS-DOS. They also licensed MS-DOS1. 10/1.14 to IBM, within a year Microsoft licensed MS-DOS to over 70 other companies. It was designed to be an OS that could run on any 8086-family computer, thus, there were many different versions of MS-DOS for different hardware, and there is a major distinction between an IBM-compatible machine and an MS-DOS machine. This design would have worked well for compatibility, if application programs had only used MS-DOS services to perform device I/O, Microsoft omitted multi-user support from MS-DOS because Microsofts Unix-based operating system, Xenix, was fully multi-user. After the breakup of the Bell System, however, AT&T Computer Systems started selling UNIX System V, believing that it could not compete with AT&T in the Unix market, Microsoft abandoned Xenix, and in 1987 transferred ownership of Xenix to the Santa Cruz Operation. On 25 March 2014, Microsoft made the code to SCP MS-DOS1.25, as an April Fools joke in 2015, Microsoft Mobile launched a Windows Phone application called MS-DOS Mobile which was presented as a new mobile operating system and worked similar to MS-DOS. Version 3.1 – Support for Microsoft Networks Version 3.2 – First version to support 3.5 inch,720 kB floppy drives and diskettes. Version 3.21 Version 3.22 – Version 3.25 Version 3.3 – First version to support 3.5 inch,1.44 MB floppy drives and diskettes, Version 3. 3a Version 3.31 – supports FAT16B and larger drives. MS-DOS4.0 and MS-DOS4.1 – A separate branch of development with additional multitasking features and it is unrelated to any later versions, including versions 4.00 and 4.01 listed below MS-DOS4. x – includes a graphical/mouse interface. It had many bugs and compatibility issues. Version 4.00 – First version to support a hard disk partition that is greater than 32 MiB. Version 4.01 – Microsoft rewritten Version 4.00 released under MS-DOS label, First version to introduce volume serial number when formatting hard disks and floppy disks
6.
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
7.
Physics
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Physics is the natural science that involves the study of matter and its motion and behavior through space and time, along with related concepts such as energy and force. One of the most fundamental disciplines, the main goal of physics is to understand how the universe behaves. Physics is one of the oldest academic disciplines, perhaps the oldest through its inclusion of astronomy, Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined. New ideas in physics often explain the mechanisms of other sciences while opening new avenues of research in areas such as mathematics. Physics also makes significant contributions through advances in new technologies that arise from theoretical breakthroughs, the United Nations named 2005 the World Year of Physics. Astronomy is the oldest of the natural sciences, the stars and planets were often a target of worship, believed to represent their gods. While the explanations for these phenomena were often unscientific and lacking in evidence, according to Asger Aaboe, the origins of Western astronomy can be found in Mesopotamia, and all Western efforts in the exact sciences are descended from late Babylonian astronomy. The most notable innovations were in the field of optics and vision, which came from the works of many scientists like Ibn Sahl, Al-Kindi, Ibn al-Haytham, Al-Farisi and Avicenna. The most notable work was The Book of Optics, written by Ibn Al-Haitham, in which he was not only the first to disprove the ancient Greek idea about vision, but also came up with a new theory. In the book, he was also the first to study the phenomenon of the pinhole camera, many later European scholars and fellow polymaths, from Robert Grosseteste and Leonardo da Vinci to René Descartes, Johannes Kepler and Isaac Newton, were in his debt. Indeed, the influence of Ibn al-Haythams Optics ranks alongside that of Newtons work of the same title, the translation of The Book of Optics had a huge impact on Europe. From it, later European scholars were able to build the devices as what Ibn al-Haytham did. From this, such important things as eyeglasses, magnifying glasses, telescopes, Physics became a separate science when early modern Europeans used experimental and quantitative methods to discover what are now considered to be the laws of physics. Newton also developed calculus, the study of change, which provided new mathematical methods for solving physical problems. The discovery of new laws in thermodynamics, chemistry, and electromagnetics resulted from greater research efforts during the Industrial Revolution as energy needs increased, however, inaccuracies in classical mechanics for very small objects and very high velocities led to the development of modern physics in the 20th century. Modern physics began in the early 20th century with the work of Max Planck in quantum theory, both of these theories came about due to inaccuracies in classical mechanics in certain situations. Quantum mechanics would come to be pioneered by Werner Heisenberg, Erwin Schrödinger, from this early work, and work in related fields, the Standard Model of particle physics was derived. Areas of mathematics in general are important to this field, such as the study of probabilities, in many ways, physics stems from ancient Greek philosophy
8.
Microsoft
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Its best known software products are the Microsoft Windows line of operating systems, Microsoft Office office suite, and Internet Explorer and Edge web browsers. Its flagship hardware products are the Xbox video game consoles and the Microsoft Surface tablet lineup, as of 2016, it was the worlds largest software maker by revenue, and one of the worlds most valuable companies. Microsoft was founded by Paul Allen and Bill Gates on April 4,1975, to develop and it rose to dominate the personal computer operating system market with MS-DOS in the mid-1980s, followed by Microsoft Windows. The companys 1986 initial public offering, and subsequent rise in its share price, since the 1990s, it has increasingly diversified from the operating system market and has made a number of corporate acquisitions. In May 2011, Microsoft acquired Skype Technologies for $8.5 billion, in June 2012, Microsoft entered the personal computer production market for the first time, with the launch of the Microsoft Surface, a line of tablet computers. The word Microsoft is a portmanteau of microcomputer and software, Paul Allen and Bill Gates, childhood friends with a passion for computer programming, sought to make a successful business utilizing their shared skills. In 1972 they founded their first company, named Traf-O-Data, which offered a computer that tracked and analyzed automobile traffic data. Allen went on to pursue a degree in science at Washington State University. The January 1975 issue of Popular Electronics featured Micro Instrumentation and Telemetry Systemss Altair 8800 microcomputer, Allen suggested that they could program a BASIC interpreter for the device, after a call from Gates claiming to have a working interpreter, MITS requested a demonstration. Since they didnt actually have one, Allen worked on a simulator for the Altair while Gates developed the interpreter and they officially established Microsoft on April 4,1975, with Gates as the CEO. Allen came up with the name of Micro-Soft, as recounted in a 1995 Fortune magazine article. In August 1977 the company formed an agreement with ASCII Magazine in Japan, resulting in its first international office, the company moved to a new home in Bellevue, Washington in January 1979. Microsoft entered the OS business in 1980 with its own version of Unix, however, it was MS-DOS that solidified the companys dominance. For this deal, Microsoft purchased a CP/M clone called 86-DOS from Seattle Computer Products, branding it as MS-DOS, following the release of the IBM PC in August 1981, Microsoft retained ownership of MS-DOS. Since IBM copyrighted the IBM PC BIOS, other companies had to engineer it in order for non-IBM hardware to run as IBM PC compatibles. Due to various factors, such as MS-DOSs available software selection, the company expanded into new markets with the release of the Microsoft Mouse in 1983, as well as with a publishing division named Microsoft Press. Paul Allen resigned from Microsoft in 1983 after developing Hodgkins disease, while jointly developing a new OS with IBM in 1984, OS/2, Microsoft released Microsoft Windows, a graphical extension for MS-DOS, on November 20,1985. Once Microsoft informed IBM of NT, the OS/2 partnership deteriorated, in 1990, Microsoft introduced its office suite, Microsoft Office
9.
Windows 95
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Windows 95 is a consumer-oriented operating system developed by Microsoft. It was released on August 24,1995, and was a significant improvement over the companys previous DOS-based Windows products, Windows 95 merged Microsofts formerly separate MS-DOS and Windows products. It featured significant improvements over its predecessor, Windows 3.1, most notably in the user interface. It was also suggested that Windows 95 had an effect of driving other major out of business. Three years after its introduction, Windows 95 was succeeded by Windows 98, Microsoft ended support for Windows 95 on December 31,2001. The initial design and planning of Windows 95 can be traced back to around March 1992, at this time, Windows for Workgroups 3.11 and Windows NT3.1 were still in development and Microsofts plan for the future was focused on Cairo. Cairo would be Microsofts next-generation operating system based on Windows NT and featuring a new interface and an object-based file system. However, Cairo would partially ship in July 1996 in the form of Windows NT4.0, but without the object-based file system, simultaneously with Windows 3. 1s release, IBM started shipping OS/22.0. Microsoft realized they were in need of a version of Windows that could support 32-bit applications and preemptive multitasking. So the development of Windows Chicago was started and, as it was planned for a late 1993 release, became known as Windows 93. Initially, the decision was not to include a new user interface, as this was planned for Cairo, and only focus on making installation, configuration. Windows 93 would ship together with MS-DOS7.0, offering an integrated experience to the user. The first version of Chicagos feature specification was finished on September 30,1992, cougar was to become Chicagos kernel. Prior to Windows 95s official release, users in the United States had an opportunity to preview it in the Windows 95 Preview Program. For US$19.95, users would receive several 3. 5-inch floppy disks that would be used to install Windows 95 either as an upgrade from Windows 3. 1x or as a fresh installation. Participants were also given a preview of The Microsoft Network. The preview versions expired in November 1995, after which the user would have to purchase their own copy of the version of Windows 95. Windows 95 was designed to be compatible with existing MS-DOS and 16-bit Windows programs and device drivers, while offering a more stable
10.
GNU
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GNU /ɡnuː/ is an operating system and an extensive collection of computer software. GNU is composed wholly of free software, most of which is licensed under the GNU Projects own GPL, GNU is a recursive acronym for GNUs Not Unix. Chosen because GNUs design is Unix-like, but differs from Unix by being free software, the GNU project includes an operating system kernel, GNU HURD, which was the original focus of the Free Software Foundation. However, non-GNU kernels, most famously Linux, can also be used with GNU software, and since the kernel is the least mature part of GNU, the combination of GNU software and the Linux kernel is commonly known as Linux. Richard Stallman, the founder of the project, views GNU as a means to a social end. unix-wizards. Software development began on January 5,1984, when Stallman quit his job at the Lab so that they could not claim ownership or interfere with distributing GNU components as free software, Richard Stallman chose the name by using various plays on words, including the song The Gnu. The goal was to bring a free software operating system into existence. This philosophy was published as the GNU Manifesto in March 1985. It was thus decided that the development would be started using C and Lisp as system programming languages, at the time, Unix was already a popular proprietary operating system. The design of Unix was modular, so it could be reimplemented piece by piece, in October 1985, Stallman set up the Free Software Foundation. In the late 1980s and 1990s, the FSF hired software developers to write the software needed for GNU, as GNU gained prominence, interested businesses began contributing to development or selling GNU software and technical support. The most prominent and successful of these was Cygnus Solutions, now part of Red Hat, GNU developers have contributed to Linux ports of GNU applications and utilities, which are now also widely used on other operating systems such as BSD variants, Solaris and macOS. Many GNU programs have been ported to other operating systems, including proprietary platforms such as Microsoft Windows, GNU programs have been shown to be more reliable than their proprietary Unix counterparts. As of November 2015, there are a total of 466 GNU packages hosted on the official GNU development site. With the April 30,2015 release of the Debian GNU/HURD2015 distro, GNU OS now provides the components to assemble a system that users can install. This includes the GNU Hurd kernel, that is currently in a pre-production state, the Hurd status page states that it may not be ready for production use, as there are still some bugs and missing features. However, it should be a base for further development. Due to Hurd not being ready for use, in practice these operating systems are Linux distributions
11.
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
12.
Pat Villani
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He used to sign his edits with patv. Villani had already been working on a DOS-like operating system for use in embedded systems for some while before the advent of FreeDOS and this interface emulator grew into a minimal operating system named XDOS around 1988. He added an IPL to set up a boot environment before loading the operating system. This system was named NSS-DOS and also offered commercially and his new DOS/NT used a microkernel architecture with logical separation of file system, memory and task manager. Villani joined the FreeDOS project in 1994 after reading Jim Halls announcement of a PD-DOS on comp. os. msdos. misc. apps. In 1996, Villani wrote the book FreeDOS Kernel, which describes the design of the DOS-C / FreeDOS kernel, the name of the operating system was subsequently officially changed to FreeDOS to reflect the spelling used in the book. Villani and other contributors analyzed and addressed many of these issues over the years for FreeDOS to become much more MS-DOS compatible, with some breaks Villani remained active with the FreeDOS project, including preparations for the release of FreeDOS1.1. Since 2009 he had held the role of the project coordinator. The FreeDOS1.1 release, published on 2 January 2012, is dedicated to him, Villani was born in Nocera Inferiore near Naples, Italy, grew up in Brooklyn, New York, USA, and moved to Freehold Township, New Jersey, in 1990. In 1976 he received his BSEE degree from Polytechnic Institute of Brooklyn, in 2008 he also received a Masters certificate in Project Management from George Washington University and he was an adjunct professor at Brookdale Community College beginning in 2010. He previously worked for Stratus Computers, Inc. on their Continuum fault-tolerant product line and he was a member of M. A. R. S. FreeDOS Kernel - An MS-DOS Emulator for Platform Independence & Embedded System Development - Master OS Development, r&D Books, Lawrence, ISBN 0-87930-436-7, ISBN 978-0-87930-436-2. US patent application number, 12/779,489, publication number, US 2010/0290455 A1, filing date, 2010-05-13, Method, pat Villanis homepage at the Wayback Machine Original DOS-C GPLd release on SourceForge DOS-C page at the Wayback Machine The FreeDOS project
13.
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
14.
COMMAND.COM
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COMMAND. COM is the default operating system shell for DOS operating systems and the default command line interpreter on Windows 95, Windows 98 and Windows ME. COMMAND. COMs successor on OS/2 and Windows NT systems is CMD. EXE, COMMAND. COM is also available on IA-32 versions of those systems to provide compatibility when running DOS applications within the NTVDM. Programs executed by COMMAND. COM are DOS programs that use the MS-DOS API to communicate with the operating system, as a shell, COMMAND. COM has two distinct modes of work. First is the mode, in which the user types commands which are then executed immediately. The second is the mode, which executes a predefined sequence of commands stored as a text file with the extension. BAT. Internal Commands are commands stored directly inside the COMMAND. COM binary, thus, they can only be executed directly from the command interpreter. All commands are run only after the Enter key is pressed at the end of the line, COMMAND. COM is not case-sensitive, meaning commands can be typed in any mixture of upper and lower case. BREAK Controls the handling of program interruption with Ctrl+C or Ctrl+Break, CHCP Displays or changes the current system code page. CHDIR, CD Changes the current working directory or displays the current directory, COPY Copies one file to another. CTTY Defines the device to use for input and output, DATE Display and set the date of the system. When used on a directory, deletes all files inside the directory only, in comparison, the external command DELTREE deletes all subdirectories and files inside a directory as well as the directory itself. DIR Lists the files in the specified directory, ECHO Toggles whether text is displayed or not. Also displays text on the screen, EXIT Exits from COMMAND. COM and returns to the program which launched it. LFNFOR Enables or disables the return of long filenames by the FOR command, LOADHIGH, LH Loads a program into upper memory. LOCK Enables external programs to perform low-level disk access to a volume, MKDIR, MD Creates a new directory. PATH Displays or changes the value of the PATH environment variable which controls the places where COMMAND. COM will search for executable files, PROMPT Displays or change the value of the PROMPT environment variable which controls the appearance of the prompt. REN, RENAME Renames a file or directory, RMDIR, RD Removes an empty directory. SET Sets the value of an environment variable, Without arguments, TIME Display and set the time of the system
15.
Batch file
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A batch file is a kind of script file in DOS, OS/2 and Microsoft Windows. It consists of a series of commands to be executed by the command-line interpreter, a batch file may contain any command the interpreter accepts interactively and use constructs that enable conditional branching and looping within the batch file, such as if, for, goto and labels. The term batch is from processing, meaning non-interactive execution. When a batch file is run, the program reads the file and executes its commands. Unix-like operating systems, such as Linux, have a similar, the filename extension. bat is used in DOS and Windows. Windows NT and OS/2 also added. cmd, batch files for other environments may have different extensions, e. g. btm in 4DOS, 4OS2 and 4NT related shells. The detailed handling of batch files has changed, some of the detail in this article applies to all batch files, while other details apply only to certain versions. In DOS, a file can be started from the command-line interface by typing its name, followed by any required parameters. When DOS loads, the file AUTOEXEC. BAT, when present, is automatically executed, a. bat file name extension identifies a file containing commands that are executed by the command interpreter COMMAND. Microsoft Windows was introduced in 1985 as a graphical user interface-based overlay on text-based operating systems and was designed to run on DOS. In order to start it, the WIN command was used, in the earlier versions, one could run a. bat type file from Windows in the MS-DOS Prompt. Windows 3. 1x and earlier, as well as Windows 9x invoked COMMAND. COM to run batch files, the IBM OS/2 operating system supported DOS-style batch files. It also included a version of REXX, a more advanced batch-file scripting language. COM, oS/2s batch file interpreter also supports an EXTPROC command. This passes the file to the program named on the EXTPROC file as a data file. The named program can be a file, this is similar to the #. Unlike Windows 98 and earlier, the Windows NT family of operating systems does not depend on MS-DOS, Windows NT introduced an enhanced 32-bit command interpreter that could execute scripts with either the. CMD or. BAT extension. Cmd. exe added additional commands, and implemented existing ones in a different way, so that the same batch file might work differently with cmd. exe. In most cases, operation is identical if the few unsupported commands are not used, Cmd. exes extensions to COMMAND. COM can be disabled for compatibility
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GNU General Public License
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The GNU General Public License is a widely used free software license, which guarantees end users the freedom to run, study, share and modify the software. The license was written by Richard Stallman of the Free Software Foundation for the GNU Project. The GPL is a license, which means that derivative work can only be distributed under the same license terms. This is in distinction to permissive free licenses, of which the BSD licenses. GPL was the first copyleft license for general use, historically, the GPL license family has been one of the most popular software licenses in the free and open-source software domain. Prominent free software licensed under the GPL include the Linux kernel. In 2007, the version of the license was released to address some perceived problems with the second version that were discovered during its long-time usage. To keep the license up to date, the GPL license includes an optional any later version clause, developers can omit it when licensing their software, for instance the Linux kernel is licensed under GPLv2 without the any later version clause. The GPL was written by Richard Stallman in 1989, for use with programs released as part of the GNU project, the original GPL was based on a unification of similar licenses used for early versions of GNU Emacs, the GNU Debugger and the GNU C Compiler. These licenses contained similar provisions to the modern GPL, but were specific to each program, rendering them incompatible, Stallmans goal was to produce one license that could be used for any project, thus making it possible for many projects to share code. The second version of the license, version 2, was released in 1991, version 3 was developed to attempt to address these concerns and was officially released on 29 June 2007. Version 1 of the GNU GPL, released on 25 February 1989, the first problem was that distributors may publish binary files only—executable, but not readable or modifiable by humans. To prevent this, GPLv1 stated that any vendor distributing binaries must also make the source code available under the same licensing terms. The second problem was that distributors might add restrictions, either to the license, the union of two sets of restrictions would apply to the combined work, thus adding unacceptable restrictions. To prevent this, GPLv1 stated that modified versions, as a whole, had to be distributed under the terms in GPLv1. Therefore, software distributed under the terms of GPLv1 could be combined with software under more permissive terms, according to Richard Stallman, the major change in GPLv2 was the Liberty or Death clause, as he calls it – Section 7. The section says that licensees may distribute a GPL-covered work only if they can all of the licenses obligations. In other words, the obligations of the license may not be severed due to conflicting obligations and this provision is intended to discourage any party from using a patent infringement claim or other litigation to impair users freedom under the license
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TWiT.tv
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TWiT. tv, which is the operating trade name of TWiT LLC, is a podcast network founded by technology broadcaster and author Leo Laporte and run by his wife and company CEO Lisa Laporte. The network began operation in April 2005 with the launch of This Week in Tech, security Now was the second podcast on the network, debuting in August of that year. TWiT founder and owner Laporte, in an October 2009 speech, stated that it grossed revenues of $1.5 million per year, while costs were around $350,000. On March 18,2015, prior to the filming of This Week in Google, TWiT gets its name from its first and flagship podcast, This Week in Tech. The logo design originated from a logic gate symbol of an AND gate turned on its side. Voiceovers are provided by Jim Cutler, tWiTs netcasts are centered around technology and technology news. Hosts of the shows are usually experts in fields, either by working in the field itself or by being a journalist covering the field. At the beginning of 2014, there were 27 podcasts produced by TWiT, giz Wiz, Marketing Mavericks and Padres Corner were among the shows that were cancelled during the year. The New Screen Savers was the new show added to the network in 2015, a show based on The Screen Savers. TWiT further cut their field of self-produced shows by nearly twenty percent in late 2015, among the shows cut were Coding 101, which was replaced with a second weekly episode of Know How. IFive for the iPhone was cancelled, with some of that content being folded into iOS Today, before You Buy was also dropped, with its last episode being produced on December 18,2015. With the departure of news director Mike Elgan in December 2015, hosts Megan Morrone and Jason Howell took over Tech News Today on a daily basis at 4PM each weekday, starting on January 4,2016. No new news director has been named, all the shows are available free to watch or download from the TWiT. tv website and are funded by cost per mille embedded sponsorship. They are filmed in their studio in Petaluma, California of which the aspect is based around a NewTek Tricaster production system. The shows have a history of making heavy-use of remote hosts and guests connecting in via Skype and this Week in Tech Episode 561 on May 8,2016 had extensive talk about podcast revenue. This would put TWIT ad revenue around $13–14 million per year and this Week in Tech was the recipient of the 2005,2008, and 2010 Peoples Choice Podcast Awards Technology category. Tech News Today was the recipient of the 2012 International Academy of Web Television award for Best News Web Series, in 2011, This Week in Tech was named Best Technology Podcast, and TWiT Photo was named Best New Technology Podcast by iTunes Rewind. This Week in Tech Official website
