Free and open-source software
Free and open-source software (F/OSS, FOSS) or free/libre/open-source software (FLOSS) is software that is both free software and open source. It is liberally licensed to grant users the right to use, copy, study, change, and improve its design through the availability of its source code. This approach has gained both momentum and acceptance as the potential benefits[clarification needed] have been increasingly recognized by both individuals and corporations.
In the context of free and open-source software, free refers to the freedom to copy and re-use the software, rather than to the price of the software. The Free Software Foundation, an organization that advocates the free software model, suggests that, to understand the concept, one should "think of free as in free speech, not as in free beer".
FOSS is an inclusive term that covers both free software and open-source software, which despite describing similar development models, have differing cultures and philosophies. Free software focuses on the fundamental freedoms it gives to users, whereas open source software focuses on the perceived strengths of its peer-to-peer development model. FOSS is a term that can be used without particular bias towards either political approach.
Free software licences and open-source licenses are used by many software packages. While the licenses themselves are in most cases the same, the two terms grew out of different philosophies and are often used to signify different distribution methodologies.
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In the 1950s, 1960s, and 1970s, it was far more common for computer users to have the freedoms that are provided by free software. Software, including source code, was commonly shared by individuals who used computers. Most companies had a business model based on hardware sales, and provided or bundled the software free of charge. Organizations of users and suppliers were formed to facilitate the exchange of software; see, for example, SHARE and DECUS.
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; rather than funding software development from hardware revenue, these new companies were selling software directly. Leased machines required software support while providing no revenue for software, and some customers able to better meet their own needs did not want the costs of software bundled with hardware product costs. In United States vs. IBM, filed 17 January 1969, the government charged that bundled software was anticompetitive. While some software might always be free, there would be a growing amount of software that was for sale only. In the 1970s and early 1980s, some parts of the software industry began using technical measures (such as only distributing binary copies of computer programs) to prevent computer users from being able to use reverse engineering techniques to study and customize software they had paid for. In 1980, the copyright law (Pub. L. No. 96-517, 94 Stat. 3015, 3028) was extended to computer programs in the United States
In 1983, Richard Stallman, longtime member of the hacker community at the MIT Artificial Intelligence Laboratory, announced the GNU project, saying that he had become frustrated with the effects of the change in culture of the computer industry and its users. Software development for the GNU operating system began in January 1984, and the Free Software Foundation (FSF) was founded in October 1985. An article outlining the project and its goals was published in March 1985 titled the GNU Manifesto. The manifesto included significant explanation of the GNU philosophy, Free Software Definition and "copyleft" ideas.
The Linux kernel, started by Linus Torvalds, was released as freely modifiable source code in 1991. The first licence wasn't a free or open-source software licence. However, with version 0.12 in February 1992, he relicensed the project under the GNU General Public License, which was. Much like Unix, Torvalds' kernel attracted the attention of volunteer programmers.
FreeBSD and NetBSD (both derived from 386BSD) were released as free software when the USL v. BSDi lawsuit was settled out of court in 1993. OpenBSD forked from NetBSD in 1995. Also in 1995, The Apache HTTP Server, commonly referred to as Apache, was released under the Apache License 1.0.
In 1997, Eric Raymond published The Cathedral and the Bazaar, a reflective analysis of the hacker community and free software principles. The paper received significant attention in early 1998, and was one factor in motivating Netscape Communications Corporation to release their popular Netscape Communicator Internet suite as free software. This code is today better known as Mozilla Firefox and Thunderbird.
Netscape's act prompted Raymond and others to look into how to bring the FSF's free software ideas and perceived benefits to the commercial software industry. They concluded that FSF's social activism was not appealing to companies like Netscape, and looked for a way to rebrand the free software movement to emphasize the business potential of sharing and collaborating on software source code. The new name they chose was "open source", and quickly Bruce Perens, publisher Tim O'Reilly, Linus Torvalds, and others signed on to the rebranding. The Open Source Initiative was founded in February 1998 to encourage use of the new term and evangelize open-source principles.
While the Open Source Initiative sought to encourage the use of the new term and evangelize the principles it adhered to, commercial software vendors found themselves increasingly threatened by the concept of freely distributed software and universal access to an application's source code. A Microsoft executive publicly stated in 2001 that "open source is an intellectual property destroyer. I can't imagine something that could be worse than this for the software business and the intellectual-property business."  This view perfectly summarizes the initial response to FOSS by some software corporations. However, while FOSS has historically played a role outside of the mainstream of private software development, companies as large as Microsoft have begun to develop official open-source presences on the Internet. IBM, Oracle, Google and State Farm are just a few of the companies with a serious public stake in today's competitive open-source market. There has been a significant shift in the corporate philosophy concerning the development of free and open-source software (FOSS).
Recent developments 
While copyright is the primary legal mechanism that FOSS authors use to ensure license compliance for their software, other mechanisms such as legislation, patents, and trademarks have implications as well. In response to legal issues with patents and the DMCA, the Free Software Foundation released version 3 of its GNU Public License in 2007 that explicitly addressed the DMCA and patent rights.
After the development of the GNU GPLv3, as copyright holder of many pieces of the GNU system, such as the GCC compiler software, the FSF updated most of the GNU programs' licenses from GPLv2 to GPLv3. Apple a user of GCC, and a heavy user of both DRM and patents decided to switch the compiler in its Xcode IDE from GCC to Clang, another FOSS compiler, but which is under a permissive license. LWN speculated that Apple was motivated partly by a desire to avoid GPLv3. The Samba project also switched to GPLv3, which Apple replaced in their software suite with a closed-source, proprietary software alternative.
Oracle in turn purchased Sun in January, 2010, acquiring their copyrights, patents, and trademarks. This made Oracle the owner of the most popular proprietary database and the most popular open-source database. Oracle's attempts to commercialize the open-source MySQL database have raised concerns in the FOSS community. Partly in response to uncertainty about the future of MySQL, the FOSS community forked the project into new database systems outside of Oracle's control. These include MariaDB, Percona, and Drizzle. All of these have distinct names; they are distinct projects and can not use the trademarked name MySQL.
In August, 2010, Oracle sued Google claiming that its use of Java in Android infringed on Oracle's copyrights and patents. The Oracle v. Google case ended In May 2012, with the finding that Google did not infringe on Oracle's patents, and the trial judge ruled that the structure of the Java APIs used by Google was not copyrightable. The jury found that Google infringed a small number of copied files, but the parties stipulated that Google would pay no damages. Oracle has appealed to the Federal Circuit, and Google has filed a cross-appeal on the literal copying claim.
FOSS and Benkler's new economy 
According to Yochai Benkler, Jack N. and Lillian R. Berkman Professor for Entrepreneurial Legal Studies at Harvard Law School, free software is the most visible part of a new economy of commons-based peer production of information, knowledge, and culture. As examples, he cites a variety of FOSS projects, including both free software and open source.
This new economy is already under development. In order to commercialize FOSS, many companies, Google being the most successful, are moving towards an economic model of advertising-supported software. In such a model, the only way to increase revenue is to make the advertising more valuable. Facebook has recently come under fire for using novel user tracking methods to accomplish this.
Free software 
Richard Stallman's Free Software Definition, adopted by the Free Software Foundation (FSF), defines free software as a matter of liberty, not price. 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 April 2008, it is published there in 39 languages.
Open source 
The Open Source 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, written and adapted primarily by Bruce Perens. Perens did not base his writing on the four freedoms of free software from the Free Software Foundation, which were only later available on the web.
The first known use of the phrase free open source software on Usenet was in a posting on 18 March 1998, just a month after the term open source itself was coined. In February 2002, F/OSS appeared on a Usenet newsgroup dedicated to Amiga computer games. In early 2002, MITRE used the term FOSS in what would later be their 2003 report Use of Free and Open Source Software (FOSS) in the U.S. Department of Defense.
The acronym FLOSS was coined in 2001 by Rishab Aiyer Ghosh for free/libre/open-source software. Later that year, the European Commission (EC) used the phrase when they funded a study on the topic.
Unlike libre software, which aimed to solve the ambiguity problem, FLOSS aimed to avoid taking sides in the debate over whether it was better to say "free software" or to say "open-source software".
Proponents of the term point out that parts of the FLOSS acronym can be translated into other languages, with for example the F representing free (English) or frei (German), and the L representing libre (Spanish or French), livre (Portuguese), or libero (Italian), liber (Romanian) and so on. However, this term is not often used in official, non-English, documents, since the words in these languages for free as in freedom do not have the ambiguity problem of free in English.
The terms "FLOSS" and "FOSS" have come under some criticism for being counterproductive and sounding silly. For instance, Eric Raymond, co-founder of the Open Source Initiative, has stated:
"Near as I can figure ... people think they’d be making an ideological commitment ... if they pick 'open source' or 'free software'. Well, speaking as the guy who promulgated 'open source' to abolish the colossal marketing blunders that were associated with the term 'free software', I think 'free software' is less bad than 'FLOSS'. Somebody, please, shoot this pitiful acronym through the head and put it out of our misery."
Raymond quotes programmer Rick Moen as stating:
"I continue to find it difficult to take seriously anyone who adopts an excruciatingly bad, haplessly obscure acronym associated with dental hygiene aids" and "neither term can be understood without first understanding both free software and open source, as prerequisite study."
Dualism of FOSS 
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The primary difference between free software and open source is one of philosophy. According to the Free Software Foundation, "Nearly all open source software is free software. The two terms describe almost the same category of software, but they stand for views based on fundamentally different values."
Thus, the Open Source Initiative considers many free software licenses to also be open source. These include the latest versions of the FSF's three main licenses, the GPL, the Lesser General Public License (LGPL), and the GNU Affero General Public License (AGPL).
Adoption by governments 
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The Government of Kerala, India, announced its official support for free/open-source software in its State IT Policy of 2001,[discuss] which was formulated after the first-ever free software conference in India, "Freedom First!", held in July 2001 in Trivandrum, the capital of Kerala, where Richard Stallman inaugurated the Free Software Foundation of India.
The German City of Munich announced its intention to switch from Microsoft Windows-based operating systems to an open-source implementation of SuSE Linux in March 2003, having achieved an adoption rate of 20% by 2010.
In 2004, a law in Venezuela (Decree 3390) went into effect, mandating a two year transition to open source in all public agencies. As of June 2009 this ambitious transition is still under way. Malaysia launched the "Malaysian Public Sector Open Source Software Program", saving millions on proprietary software licences till 2008.
In 2005 the Government of Peru voted to adopt open source across all its bodies. The 2002 response to Microsoft's critique is available online. In the preamble to the bill, the Peruvian government stressed that the choice was made to ensure that key pillars of democracy were safeguarded: "The basic principles which inspire the Bill are linked to the basic guarantees of a state of law." In September, the Commonwealth of Massachusetts announced its formal adoption of the OpenDocument standard for all Commonwealth entities.
In February 2009, the United States White House moved its website to Linux servers using Drupal for content management. In March, the French Gendarmerie Nationale announced it will totally switch to Ubuntu by 2015.
In January 2010, the Government of Jordan announced that it has formed a partnership with Ingres Corporation, a leading open source database management company based in the United States that is now known as Actian Corporation, to promote the use of open-source software starting with university systems in Jordan.
See also 
- Alternative terms for free software
- FLOSS Manuals
- FLOSS Weekly
- Free software community
- Free Software Foundation
- Graphics hardware and FOSS
- Hacker (programmer subculture)
- List of free and open source software packages
- Outline of free software
- Software wars
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|Wikibooks has a book on the topic of: FLOSS Concept Booklet|
|Wikibooks has a book on the topic of: FOSS A General Introduction|
- FOSSBazaar: community for free and open source software governance
- FLOSSworld: Free/Libre/Open Source Software: Worldwide impact study
- Free / Open Source Research Community (mit.edu)
- FreeOpenSourceSoftware.org: Wiki on FOSS history, organizations, licenses, people, software.
- International Free and Open Source Software Foundation