Free and open-source software
Free and open-source software is software that can be classified as both free software and open-source software. That is, anyone is licensed to use, copy and change the software in any way, the source code is shared so that people are encouraged to voluntarily improve the design of the software; this is in contrast to proprietary software, where the software is under restrictive copyright licensing and the source code is hidden from the users. FOSS maintains the software user's civil liberty rights. Other benefits of using FOSS can include decreased software costs, increased security and stability, protecting privacy and giving users more control over their own hardware. Free and open-source operating systems such as Linux and descendants of BSD are utilized today, powering millions of servers, desktops and other devices. Free-software licenses and open-source licenses are used by many software packages; the free-software movement and the open-source software movement are online social movements behind widespread production and adoption of FOSS.
"Free and open-source software" is an umbrella term for software, considered both Free software and open-source software. FOSS allows the user to inspect the source code and provides a high level of control of the software's functions compared to proprietary software; the term "free software" does not refer to the monetary cost of the software at all, but rather whether the license maintains the software user's civil liberties. There are a number of related terms and abbreviations for free and open-source software, or free/libre and open-source software. Although there is a complete overlap between free-software licenses and open-source-software licenses, there is a strong philosophical disagreement between the advocates of these two positions; the terminology of FOSS or "Free and Open-source software" was created to be a neutral on these philosophical disagreements between the FSF and OSI and have a single unified term that could refer to both concepts. As the Free Software Foundation explains the philosophical difference between free software and open-source software: "The two terms describe the same category of software, but they stand for views based on fundamentally different values.
Open-source is a development methodology. For the free-software movement, free software is an ethical imperative, essential respect for the users' freedom. By contrast, the philosophy of open-source considers issues in terms of how to make software “better”—in a practical sense only." In parallel to this the Open Source Initiative considers many free-software licenses to be open source. These include the latest versions of the FSF's three main licenses: the GPL, the Lesser General Public License, the GNU Affero General Public License. Richard Stallman's Free Software Definition, adopted by the Free Software Foundation, defines free software as a matter of liberty not price, it upholds the Four Essential Freedoms; the earliest-known publication of the definition of his free-software idea was in the February 1986 edition of the FSF's now-discontinued GNU's Bulletin publication. The canonical source for the document is in the philosophy section of the GNU Project website; as of August 2017, it is published there in 40 languages.
To meet the definition of "free software", the FSF requires the software's licensing rights what the FSF respect the civil liberties / human rights of what the FSF calls the software user's "Four Essential Freedoms". The freedom to run the program as you wish, for any purpose; the freedom to study how the program works, change it so it does your computing as you wish. Access to the source code is a precondition for this; the freedom to redistribute copies. The freedom to distribute copies of your modified versions to others. By doing this you can give the whole community a chance to benefit from your changes. Access to the source code is a precondition for this; the open-source-software definition is used by the Open Source Initiative to determine whether a software license qualifies for the organization's insignia for Open-source software. The definition was based on the Debian Free Software Guidelines and adapted by Bruce Perens. Perens did not base his writing on the Four Essential Freedoms of free software from the Free Software Foundation, which were only available on the web.
Perens subsequently stated that he felt Eric Raymond's promotion of Open-source unfairly overshadowed the Free Software Foundation's efforts and reaffirmed his support for Free software. In the following 2000s, he spoke about open source again. In the 1950s through the 1980s, it was common for computer users to have the source code for all programs they used, the permission and ability to modify it for their own use. Software, including source code, was shared by individuals who used computers as public domain software. Most companies had a business model based on hardware sales, provided or bundled software with hardware, free of charge. By the late 1960s, the prevailing business model around software was changing. A growing and evolving software industry was competing with the hardware manufacturer's bundled software products. Leased machines required software support while providing n
Unix is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, development starting in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, others. Intended for use inside the Bell System, AT&T licensed Unix to outside parties in the late 1970s, leading to a variety of both academic and commercial Unix variants from vendors including University of California, Microsoft, IBM, Sun Microsystems. In the early 1990s, AT&T sold its rights in Unix to Novell, which sold its Unix business to the Santa Cruz Operation in 1995; the UNIX trademark passed to The Open Group, a neutral industry consortium, which allows the use of the mark for certified operating systems that comply with the Single UNIX Specification. As of 2014, the Unix version with the largest installed base is Apple's macOS. Unix systems are characterized by a modular design, sometimes called the "Unix philosophy"; this concept entails that the operating system provides a set of simple tools that each performs a limited, well-defined function, with a unified filesystem as the main means of communication, a shell scripting and command language to combine the tools to perform complex workflows.
Unix distinguishes itself from its predecessors as the first portable operating system: the entire operating system is written in the C programming language, thus allowing Unix to reach numerous platforms. Unix was meant to be a convenient platform for programmers developing software to be run on it and on other systems, rather than for non-programmers; the system grew larger as the operating system started spreading in academic circles, as users added their own tools to the system and shared them with colleagues. At first, Unix was not designed to be multi-tasking. Unix gained portability, multi-tasking and multi-user capabilities in a time-sharing configuration. Unix systems are characterized by various concepts: the use of plain text for storing data; these concepts are collectively known as the "Unix philosophy". Brian Kernighan and Rob Pike summarize this in The Unix Programming Environment as "the idea that the power of a system comes more from the relationships among programs than from the programs themselves".
In an era when a standard computer consisted of a hard disk for storage and a data terminal for input and output, the Unix file model worked quite well, as I/O was linear. In the 1980s, non-blocking I/O and the set of inter-process communication mechanisms were augmented with Unix domain sockets, shared memory, message queues, semaphores, network sockets were added to support communication with other hosts; as graphical user interfaces developed, the file model proved inadequate to the task of handling asynchronous events such as those generated by a mouse. By the early 1980s, users began seeing Unix as a potential universal operating system, suitable for computers of all sizes; the Unix environment and the client–server program model were essential elements in the development of the Internet and the reshaping of computing as centered in networks rather than in individual computers. Both Unix and the C programming language were developed by AT&T and distributed to government and academic institutions, which led to both being ported to a wider variety of machine families than any other operating system.
Under Unix, the operating system consists of many libraries and utilities along with the master control program, the kernel. The kernel provides services to start and stop programs, handles the file system and other common "low-level" tasks that most programs share, schedules access to avoid conflicts when programs try to access the same resource or device simultaneously. To mediate such access, the kernel has special rights, reflected in the division between user space and kernel space - although in microkernel implementations, like MINIX or Redox, functions such as network protocols may run in user space; the origins of Unix date back to the mid-1960s when the Massachusetts Institute of Technology, Bell Labs, General Electric were developing Multics, a time-sharing operating system for the GE-645 mainframe computer. Multics featured several innovations, but presented severe problems. Frustrated by the size and complexity of Multics, but not by its goals, individual researchers at Bell Labs started withdrawing from the project.
The last to leave were Ken Thompson, Dennis Ritchie, Douglas McIlroy, Joe Ossanna, who decided to reimplement their experiences in a new project of smaller scale. This new operating system was without organizational backing, without a name; the new operating system was a single-tasking system. In 1970, the group coined the name Unics for Uniplexed Information and Computing Service, as a pun on Multics, which stood for Multiplexed Information and Computer Services. Brian Kernighan takes credit for the idea, but adds that "no one can remember" the origin of the final spelling Unix. Dennis Ritchie, Doug McIlroy, Peter G. Neumann credit Kernighan; the operating system was written in assembly language, but in 1973, Version 4 Unix was rewritten in C. Version 4 Unix, still had many PDP-11 dependent codes, is not suitable for porting; the first port to other platform was made five years f
University of California, Berkeley
The University of California, Berkeley is a public research university in Berkeley, California. It was founded in 1868 and serves as the flagship institution of the ten research universities affiliated with the University of California system. Berkeley has since grown to instruct over 40,000 students in 350 undergraduate and graduate degree programs covering numerous disciplines. Berkeley is one of the 14 founding members of the Association of American Universities, with $789 million in R&D expenditures in the fiscal year ending June 30, 2015. Today, Berkeley maintains close relationships with three United States Department of Energy National Laboratories—Lawrence Berkeley National Laboratory, Lawrence Livermore National Laboratory and Los Alamos National Laboratory—and is home to many institutes, including the Mathematical Sciences Research Institute and the Space Sciences Laboratory. Through its partner institution University of California, San Francisco, Berkeley offers a joint medical program at the UCSF Medical Center.
As of October 2018, Berkeley alumni, faculty members and researchers include 107 Nobel laureates, 25 Turing Award winners, 14 Fields Medalists. They have won 9 Wolf Prizes, 45 MacArthur Fellowships, 20 Academy Awards, 14 Pulitzer Prizes and 207 Olympic medals. In 1930, Ernest Lawrence invented the cyclotron at Berkeley, based on which UC Berkeley researchers along with Berkeley Lab have discovered or co-discovered 16 chemical elements of the periodic table – more than any other university in the world. During the 1940s, Berkeley physicist J. R. Oppenheimer, the "Father of the Atomic Bomb," led the Manhattan project to create the first atomic bomb. In the 1960s, Berkeley was noted for the Free Speech Movement as well as the Anti-Vietnam War Movement led by its students. In the 21st century, Berkeley has become one of the leading universities in producing entrepreneurs and its alumni have founded a large number of companies worldwide. Berkeley is ranked among the top 20 universities in the world by the Academic Ranking of World Universities, the Times Higher Education World University Rankings, the U.
S. News & World Report Global University Rankings, it is considered one of the "Public Ivies", meaning that it is a public university thought to offer a quality of education comparable to that of the Ivy League. In 1866, the private College of California purchased the land comprising the current Berkeley campus in order to re-sell it in subdivided lots to raise funds; the effort failed to raise the necessary funds, so the private college merged with the state-run Agricultural and Mechanical Arts College to form the University of California, the first full-curriculum public university in the state. Upon its founding, The Dwinelle Bill stated that the "University shall have for its design, to provide instruction and thorough and complete education in all departments of science and art, industrial and professional pursuits, general education, special courses of instruction in preparation for the professions". Ten faculty members and 40 students made up the new University of California when it opened in Oakland in 1869.
Frederick H. Billings was a trustee of the College of California and suggested that the new site for the college north of Oakland be named in honor of the Anglo-Irish philosopher George Berkeley. In 1870, Henry Durant, the founder of the College of California, became the first president. With the completion of North and South Halls in 1873, the university relocated to its Berkeley location with 167 male and 22 female students where it held its first classes. Beginning in 1891, Phoebe Apperson Hearst made several large gifts to Berkeley, funding a number of programs and new buildings and sponsoring, in 1898, an international competition in Antwerp, where French architect Émile Bénard submitted the winning design for a campus master plan. In 1905, the University Farm was established near Sacramento becoming the University of California, Davis. In 1919, Los Angeles State Normal School became the southern branch of the University, which became University of California, Los Angeles. By 1920s, the number of campus buildings had grown and included twenty structures designed by architect John Galen Howard.
Robert Gordon Sproul served as president from 1930 to 1958. In the 1930s, Ernest Lawrence helped establish the Radiation Laboratory and invented the cyclotron, which won him the Nobel physics prize in 1939. Based on the cyclotron, UC Berkeley scientists and researchers, along with Berkeley Lab, went on to discover 16 chemical elements of the periodic table – more than any other university in the world. In particular, during World War II and following Glenn Seaborg's then-secret discovery of plutonium, Ernest Orlando Lawrence's Radiation Laboratory began to contract with the U. S. Army to develop the atomic bomb. UC Berkeley physics professor J. Robert Oppenheimer was named scientific head of the Manhattan Project in 1942. Along with the Lawrence Berkeley National Laboratory, Berkeley was a partner in managing two other labs, Los Alamos National Laboratory and Lawrence Livermore National Laboratory. By 1942, the American Council on Education ranked Berkeley second only to Harvard in the number of distinguished departments.
During the McCarthy era in 1949, the Board of Regents adopted an anti-communist loyalty oath. A number of faculty members led by Edward C. Tolman were dismissed. In 1952, the University of California became; each campus was give
Virtual International Authority File
The Virtual International Authority File is an international authority file. It is a joint project of several national libraries and operated by the Online Computer Library Center. Discussion about having a common international authority started in the late 1990s. After a series of failed attempts to come up with a unique common authority file, the new idea was to link existing national authorities; this would present all the benefits of a common file without requiring a large investment of time and expense in the process. The project was initiated by the US Library of Congress, the German National Library and the OCLC on August 6, 2003; the Bibliothèque nationale de France joined the project on October 5, 2007. The project transitioned to being a service of the OCLC on April 4, 2012; the aim is to link the national authority files to a single virtual authority file. In this file, identical records from the different data sets are linked together. A VIAF record receives a standard data number, contains the primary "see" and "see also" records from the original records, refers to the original authority records.
The data are available for research and data exchange and sharing. Reciprocal updating uses the Open Archives Initiative Protocol for Metadata Harvesting protocol; the file numbers are being added to Wikipedia biographical articles and are incorporated into Wikidata. VIAF's clustering algorithm is run every month; as more data are added from participating libraries, clusters of authority records may coalesce or split, leading to some fluctuation in the VIAF identifier of certain authority records. Authority control Faceted Application of Subject Terminology Integrated Authority File International Standard Authority Data Number International Standard Name Identifier Wikipedia's authority control template for articles Official website VIAF at OCLC
The Internet is the global system of interconnected computer networks that use the Internet protocol suite to link devices worldwide. It is a network of networks that consists of private, academic and government networks of local to global scope, linked by a broad array of electronic and optical networking technologies; the Internet carries a vast range of information resources and services, such as the inter-linked hypertext documents and applications of the World Wide Web, electronic mail and file sharing. Some publications no longer capitalize "internet"; the origins of the Internet date back to research commissioned by the federal government of the United States in the 1960s to build robust, fault-tolerant communication with computer networks. The primary precursor network, the ARPANET served as a backbone for interconnection of regional academic and military networks in the 1980s; the funding of the National Science Foundation Network as a new backbone in the 1980s, as well as private funding for other commercial extensions, led to worldwide participation in the development of new networking technologies, the merger of many networks.
The linking of commercial networks and enterprises by the early 1990s marked the beginning of the transition to the modern Internet, generated a sustained exponential growth as generations of institutional and mobile computers were connected to the network. Although the Internet was used by academia since the 1980s, commercialization incorporated its services and technologies into every aspect of modern life. Most traditional communication media, including telephony, television, paper mail and newspapers are reshaped, redefined, or bypassed by the Internet, giving birth to new services such as email, Internet telephony, Internet television, online music, digital newspapers, video streaming websites. Newspaper and other print publishing are adapting to website technology, or are reshaped into blogging, web feeds and online news aggregators; the Internet has enabled and accelerated new forms of personal interactions through instant messaging, Internet forums, social networking. Online shopping has grown exponentially both for major retailers and small businesses and entrepreneurs, as it enables firms to extend their "brick and mortar" presence to serve a larger market or sell goods and services online.
Business-to-business and financial services on the Internet affect supply chains across entire industries. The Internet has no single centralized governance in either technological implementation or policies for access and usage; the overreaching definitions of the two principal name spaces in the Internet, the Internet Protocol address space and the Domain Name System, are directed by a maintainer organization, the Internet Corporation for Assigned Names and Numbers. The technical underpinning and standardization of the core protocols is an activity of the Internet Engineering Task Force, a non-profit organization of loosely affiliated international participants that anyone may associate with by contributing technical expertise. In November 2006, the Internet was included on USA Today's list of New Seven Wonders; when the term Internet is used to refer to the specific global system of interconnected Internet Protocol networks, the word is a proper noun that should be written with an initial capital letter.
In common use and the media, it is erroneously not capitalized, viz. the internet. Some guides specify that the word should be capitalized when used as a noun, but not capitalized when used as an adjective; the Internet is often referred to as the Net, as a short form of network. As early as 1849, the word internetted was used uncapitalized as an adjective, meaning interconnected or interwoven; the designers of early computer networks used internet both as a noun and as a verb in shorthand form of internetwork or internetworking, meaning interconnecting computer networks. The terms Internet and World Wide Web are used interchangeably in everyday speech. However, the World Wide Web or the Web is only one of a large number of Internet services; the Web is a collection of interconnected documents and other web resources, linked by hyperlinks and URLs. As another point of comparison, Hypertext Transfer Protocol, or HTTP, is the language used on the Web for information transfer, yet it is just one of many languages or protocols that can be used for communication on the Internet.
The term Interweb is a portmanteau of Internet and World Wide Web used sarcastically to parody a technically unsavvy user. Research into packet switching, one of the fundamental Internet technologies, started in the early 1960s in the work of Paul Baran and Donald Davies. Packet-switched networks such as the NPL network, ARPANET, the Merit Network, CYCLADES, Telenet were developed in the late 1960s and early 1970s; the ARPANET project led to the development of protocols for internetworking, by which multiple separate networks could be joined into a network of networks. ARPANET development began with two network nodes which were interconnected between the Network Measurement Center at the University of California, Los Angeles Henry Samueli School of Engineering and Applied Science directed by Leonard Kleinrock, the NLS system at SRI International by Douglas Engelbart in Menlo Park, California, on 29 October 1969; the third site was the Culler-Fried Interactive Mathematics Center at the University of California, Santa Barbara, followed by the University of
O'Reilly Media is an American media company established by Tim O'Reilly that publishes books and Web sites and produces conferences on computer technology topics. Their distinctive brand features a woodcut of an animal on many of their book covers; the company began in 1978 as a private consulting firm doing technical writing, based in the Cambridge, Massachusetts area. In 1984, it began to retain publishing rights on manuals created for Unix vendors. A few 70-page "Nutshell Handbooks" were well-received, but the focus remained on the consulting business until 1988. After a conference displaying O'Reilly's preliminary Xlib manuals attracted significant attention, the company began increasing production of manuals and books; the original cover art consisted of animal designs developed by Edie Freedman because she thought that Unix program names sounded like "weird animals". In 1993 O'Reilly Media created the first web portal, when they launched one of the first Web-based resources, Global Network Navigator.
GNN was sold to AOL in one of the first large transactions of the dot-com bubble. GNN was the first site on the World Wide Web to feature paid advertising. Although O'Reilly Media got its start in publishing two decades after its genesis the company expanded into event production. In 1997, O'Reilly launched The Perl Conference to cross-promote its books on the Perl programming language. Many of the company's other software bestsellers were on topics that were off the radar of the commercial software industry. In 1998, O'Reilly invited many of the leaders of software projects to a meeting. Called the freeware summit, the meeting became known as the Open Source Summit; the O'Reilly Open Source Convention is now one of O'Reilly's flagship events. Other key events include the Strata Conference on big data, the Velocity Conference on Web Performance and Operations, FOO Camp. Past events of note include the Web 2.0 Summit. Overall, O'Reilly describes its business not as publishing or conferences, but as "changing the world by spreading the knowledge of innovators."Today, the company offers over one dozen conferences: Strata + Hadoop World OSCON Fluent Velocity The Next:Economy Summit The Next:Money Summit The Solid Conference The O'Reilly Software Architecture Conference The O'Reilly Design Conference O'Reilly Emerging Technology Conference Tools of Change Conference Web 2.0 Summit Web 2.0 Expo MySQL Conference and Expo RailsConf Where 2.0 Money:Tech Gov 2.0 Expo and Gov 2.0 Summit O'Reilly school of technology will be discontinued as of January 6, 2016, new enrollments are no longer accepted.
In the late 1990s, O'Reilly founded the O'Reilly Network, which grew to include sites such as: LinuxDevCenter.com MacDevCenter.com WindowsDevCenter.com ONLamp.com O'Reilly RadarIn 2008 the company revised its online model and stopped publishing on several of its sites. The company produced dev2dev in association with BEA and java.net in association with Sun Microsystems and CollabNet. In 2001, O'Reilly launched Safari Books Online, a subscription-based service providing access to ebooks as a joint venture with the Pearson Technology Group. Safari Books Online includes books and video from Adobe Press, Alpha Books, Cisco Press, FT Press, Microsoft Press, New Riders Publishing, O'Reilly, Peachpit Press, Prentice Hall, Prentice Hall PTR, Que and Sams Publishing. In 2014, O'Reilly Media acquired Pearson's stake, making Safari Books Online a wholly owned subsidiary of O'Reilly Media. O'Reilly did a redesign of the site and has some success in the attempt to expand beyond Safari's core B2C market into the B2B Enterprise market.
In 2017, O'Reilly Media announced they were no longer selling books including eBooks. Instead, everyone was encouraged to sign up to Safari. In 2003, after the dot com bust, O'Reilly's corporate goal was to reignite enthusiasm in the computer industry. To do this, Dale Dougherty and Tim O'Reilly decided to use the term "Web 2.0" coined in January 1999 by Darcy DiNucci. The term was used for the Web 2.0 Summit run by O'Reilly TechWeb. CMP registered Web 2.0 as a Service Mark "for arranging and conducting live events, namely trade shows, business conferences and educational conferences in various fields of computers and information technology." Web 2.0 framed what distinguished the companies that survived the dot com bust from those that died, identified key drivers of future success, including what is now called “cloud computing,” big data, new approaches to iterative, data-driven software development. In May 2006 CMP Media learned of an impending event called the "Web 2.0 Half day conference."
Concerned over their obligation to take reasonable means to enforce their trade and service marks CMP sent a cease and desist letter to the non-profit Irish organizers of the event. This attempt to restrict through legal mechanisms the use of the term was criticized by some; the legal issue was resolved by O'Reilly's apologizing for the early and aggressive involvement of attorneys, rather than calling the organizers, allowing them to use the service mark for this single event. In January 2005 the compan
Sendmail, Inc. is an email management business. The company is headquartered in Emeryville, CA with offices throughout the Americas and Asia; the company was founded in 1998 by Eric Allman, creator of the sendmail open source mail transfer agent. In 2005, Sendmail released the Sentrion email infrastructure platform to address the need for full-content message inspection, enabling policy-based delivery of all human and machine-generated email. In 2012, Sendmail partnered with Mimecast to provide hybrid-cloud email security and continuity as some predicted that 2013 would see more organizations implementing hybrid cloud computing strategies to reduce cost and complexity of their messaging infrastructure. In 2012, Sendmail released Sentrion REAC amid growing security and other concerns posed by the growth of application-generated email and migration of email to the cloud. In 2013, Sendmail was acquired by security-as-a-service company Proofpoint, Inc. 1998 | Released Switch, the commercial MTA 2000 | Released Sendmail Milter API 2001 | Released Mailstream Manager for email security and compliant policy management 2003 | Released Mailcenter for the enterprise 2005 | Shipped first Sentrion™ appliance 2006 | Celebrated 25th anniversary of internet email 2007 | Shipped Sentrion MP ‘inbound & outbound’ Appliance 2008 | Released Sentrion MPV and Sentrion™ MPQ 2009 | Released Sentrion Cloud Services 2010 | Opened Sentrion App Store 2011 | Sendmail teams with Harris and BMC on trusted enterprise cloud 2011 | Released Sentrion Critical Customer Communications Enterprise Application Suite 2012 | Released Sentrion REAC 2013 | Acquired by Proofpoint, Inc