Free and open-source software

Software whose source code is available and which is permissively licensed
"FLOSS", "FOSS", and "Free and Open-source" redirect here. For hardware, see Open-source hardware. For other uses of "Foss", see Foss (disambiguation). For other uses of "Floss", see Floss (disambiguation).
A screenshot of free and open-source software (FOSS): Fedora Linux 36 running the KDE Plasma 5 desktop environment, Firefox, Dolphin file manager, VLC media player, LibreOffice Writer, GIMP, and KCalc

Free and open-source software (FOSS) is software that is available under a license that grants the right to use, modify, and distribute the software, modified or not, to everyone free of charge. The public availability of the source code is, therefore, a necessary but not sufficient condition. FOSS is an inclusive umbrella term for free software and open-source software.[lower-alpha 1] FOSS is in contrast to proprietary software, where the software is under restrictive copyright or licensing and the source code is hidden from the users.

FOSS maintains the software user's civil liberty rights via the "Four Essential Freedoms" of free software. Other benefits of using FOSS include decreased software costs, increased security against malware, stability, privacy, opportunities for educational usage, and giving users more control over their own hardware. Free and open-source operating systems such as Linux and descendants of BSD are widely used today, powering millions of servers, desktops, smartphones, and other devices. Lua error: not enough memory.Lua error: not enough memory.Lua error: not enough memory.Lua error: not enough memory. Free-software licenses and open-source licenses are used by many software packages today. The free software movement and the open-source software movement are online social movements behind widespread production, adoption and promotion of FOSS, with the former preferring to use the terms FLOSS, free or libre.

Overview

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"Free and open-source software" (FOSS) is an umbrella term for software that is simultaneously considered both free software and open-source software.[1] The precise definition of the terms "free software" and "open-source software" applies them to any software distributed under terms that allow users to use, modify, and redistribute said software in any manner they see fit, without requiring that they pay the author(s) of the software a royalty or fee for engaging in the listed activities.Lua error: not enough memory.Lua error: not enough memory.

Although there is an almost 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 was created to be a neutral on these philosophical disagreements between the Free Software Foundation (FSF) and Open Source Initiative (OSI) and have a single unified term that could refer to both concepts.[2]

Free software

Richard Stallman's Free Software Definition, adopted by the FSF, defines free software as a matter of liberty, not price,[3][4] and that which upholds the Four Essential Freedoms. The earliest known publication of this definition of his free software definition was in the February 1986 edition[5] 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 2017Lua error: not enough memory., it is published in 40 languages.[6]

Four essential freedoms of Free Software

To meet the definition of "free software", the FSF requires the software's licensing respect the civil liberties / human rights of what the FSF calls the software user's "Four Essential Freedoms".[7]

  • The freedom to run the program as you wish, for any purpose (freedom 0).
  • The freedom to study how the program works, and change it so it does your computing as you wish (freedom 1). Access to the source code is a precondition for this.
  • The freedom to redistribute copies so you can help others (freedom 2).
  • The freedom to distribute copies of your modified versions to others (freedom 3). 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.[7]

Open source

The Open Source Definition is used by the Open Source Initiative (OSI) 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.[8][9] Perens did not base his writing on the Four Essential Freedoms of free software from the Free Software Foundation, which were only later available on the web.[10] 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.[11] In the following 2000s, he spoke about open source again.[12][13]

History

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From the 1950s and on through the 1980s, it was common for computer users to have the source code for all programs they used, and the permission and ability to modify it for their own use. Software, including source code, was commonly shared by individuals who used computers, often as public-domain software[14] (FOSS is not the same as public domain software, as public domain software does not contain copyrights[15]). Most companies had a business model based on hardware sales, and provided or bundled software with hardware, free of charge.[16]

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 who were 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 January 17, 1969, the government charged that bundled software was anticompetitive.Lua error: not enough memory.Lua error: not enough memory. While some software was still being provided without monetary cost and license restriction, there was a growing amount of software that was only at a monetary cost with restricted licensing. In the 1970s and early 1980s, some parts of the software industry began using technical measures (such as distributing only 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 was extended to computer programs in the United States[17]—previously, computer programs could be considered ideas, procedures, methods, systems, and processes, which are not copyrightable.[18]Lua error: not enough memory.Lua error: not enough memory.

Early on, closed-source software was uncommon until the mid-1970s to the 1980s, when IBM implemented in 1983 an "object code only" policy, no longer distributing source code.[19][20][21]

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.Lua error: not enough memory.Lua error: not enough memory. 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 FSF takes the position that the fundamental issue Free software addresses is an ethical one—to ensure software users can exercise what it calls "The Four Essential Freedoms".[1]

The Linux kernel, created by Linus Torvalds, was released as freely modifiable source code in 1991. Initially, Linux was not released under either a Free software or an Open-source software license. However, with version 0.12 in February 1992, he relicensed the project under the GNU General Public License.[22]

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 the use of the new term and evangelize open-source principles.[23]

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."Lua error: not enough memory.Lua error: not enough memory. Companies have indeed faced copyright infringement issues when embracing FOSS.[24] For many years FOSS played a niche role outside of the mainstream of private software development. However the success of FOSS Operating Systems such as Linux, BSD and the companies based on FOSS such as Red Hat, has changed the software industry's attitude and there has been a dramatic shift in the corporate philosophy concerning its development.Lua error: not enough memory.Lua error: not enough memory.

Usage

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Benefits over proprietary software

Personal control, customizability and freedom

Lua error: not enough memory. Users of FOSS benefit from the Four Essential Freedoms to make unrestricted use of, and to study, copy, modify, and redistribute such software with or without modification. If they would like to change the functionality of software they can bring about changes to the code and, if they wish, distribute such modified versions of the software or often − depending on the software's decision making model and its other users − even push or request such changes to be made via updates to the original software.[25][26][27][28][29]

Privacy and security

Lua error: not enough memory. Manufacturers of proprietary, closed-source software are sometimes pressured to building in backdoors or other covert, undesired features into their software.[30][31][32][33] Instead of having to trust software vendors, users of FOSS can inspect and verify the source code themselves and can put trust on a community of volunteers and users.[29] As proprietary code is typically hidden from public view, only the vendors themselves and hackers may be aware of any vulnerabilities in them[29] while FOSS involves as many people as possible for exposing bugs quickly.[34][35]

Low costs or no costs

FOSS is often free of charge although donations are often encouraged. This also allows users to better test and compare software.[29]

Quality, collaboration and efficiency

Lua error: not enough memory. FOSS allows for better collaboration among various parties and individuals with the goal of developing the most efficient software for its users or use-cases while proprietary software is typically meant to generate profits. Furthermore, in many cases more organizations and individuals contribute to such projects than to proprietary software.[29] It has been shown that technical superiority is typically the primary reason why companies choose open source software.[29]

Drawbacks compared to proprietary software

Security and user-support

Lua error: not enough memory. According to Linus's law the more people who can see and test a set of code, the more likely any flaws will be caught and fixed quickly. However, this does not guarantee a high level of participation. Having a grouping of full-time professionals behind a commercial product can in some cases be superior to FOSS.[29][34][36]

Furthermore, publicized source code might make it easier for hackers to find vulnerabilities in it and write exploits. This however assumes that such malicious hackers are more effective than white hat hackers which responsibly disclose or help fix the vulnerabilities, that no code leaks or exfiltrations occur and that reverse engineering of proprietary code is a hindrance of significance for malicious hackers.[34]

Hardware and software compatibility

Lua error: not enough memory. Sometimes, FOSS is not compatible with proprietary hardware or specific software. This is often due to manufacturers obstructing FOSS such as by not disclosing the interfaces or other specifications needed for members of the FOSS movement to write drivers for their hardware - for instance as they wish customers to run only their own proprietary software or as they might benefit from partnerships.[37][38][39][40][41][42][43]

Bugs and missing features

Lua error: not enough memory. While FOSS can be superior to proprietary equivalents in terms of software features and stability, in many cases it has more unfixed bugs and missing features when compared to similar commercial software.[44]Lua error: not enough memory. This varies per case, and usually depends on the level of interest in a particular project. However, unlike close-sourced software, improvements can be made by anyone who has the motivation, time and skill to do so.[36]Lua error: not enough memory.

A common obstacle in FOSS development is the lack of access to some common official standards, due to costly royalties or required non-disclosure agreements (e.g., for the DVD-Video format).[45]

Less guarantee of development

There is often less certainty of FOSS projects gaining the required resources and participation for continued development than commercial software backed by companies.[46]Lua error: not enough memory. However, companies also often abolish projects for being unprofitable, yet large companies may rely on, and hence co-develop, open source software.[35] On the other hand, if the vendor of proprietary software ceases development, there are no alternatives; whereas with FOSS, any user who needs it still has the right, and the source-code, to continue to develop it themself, or pay a 3rd party to do so.

Missing applications

As the FOSS operating system distributions of Linux has a lower market share of end users there are also fewer applications available.[47][48]

Adoption by governments

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Country Description
Brazil In 2006, the Brazilian government has simultaneously encouraged the distribution of cheap computers running Linux throughout its poorer communities by subsidizing their purchase with tax breaks.Lua error: not enough memory.Lua error: not enough memory.
Ecuador In April 2008,[49] Ecuador passed a similar law, Decree 1014, designed to migrate the public sector to Libre Software.[50]
France In March 2009, the French Gendarmerie Nationale announced it will totally switch to Ubuntu by 2015. The Gendarmerie began its transition to open source software in 2005 when it replaced Microsoft Office with OpenOffice.org across the entire organization.Lua error: not enough memory.Lua error: not enough memory. In September 2012, the French Prime Minister laid down a set of action-oriented recommendations about using open-source in the French public administration.[51] These recommendations are published in a document based on the works of an inter-ministerial group of experts.[52] This document stops some orientations like establishing an actual convergence on open-source stubs, activating a network of expertise about converging stubs, improving the support of open-source software, contributing to selected stubs, following the big communities, spreading alternatives to the main commercial solutions, tracing the use of open-source and its effects, developing the culture of use of the open-source licenses in the developments of public information systems. One of the aim of this experts groups is also to establish lists of recommended open-source software to use in the French public administration.[53]
Germany In the German City of Munich, conversion of 15,000 PCs and laptops from Microsoft Windows-based operating systems to a Debian-based Linux environment called LiMux spanned the ten years of 2003 to 2013. After successful completion of the project, more than 80% of all computers were running Linux.[54] On November 13, 2017, The Register reported that Munich was planning to revert to Windows 10 by 2020.[55] But in 2020, Munich decided to shift back from Microsoft to Linux again.[56] In 2022 Germany launched[57] Open CoDE, its own FOSS repository and forum.
India The Government of Kerala, India, announced its official support for free and open-source software in its State IT Policy of 2001,[58][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. In 2009, Government of Kerala started the International Centre for Free and Open Source Software (ICFOSS).[59] In March 2015 the Indian government announced a policy on adoption of FOSS.Lua error: not enough memory.Lua error: not enough memory.[60]
Italy The Italian military is transitioning to LibreOffice and the OpenDocument Format (ODF). LibreItalia Association announced on September 15, 2015, that the Ministry of Defence would over the next year-and-a-half install this suite of office productivity tools on some 150,000 PC workstations, making it Europe's second-largest LibreOffice implementation.[61] By June 23, 2016, 6,000 stations have been migrated.[62] E-learning military platform.[63]Lua error: not enough memory.Lua error: not enough memory.
Jordan In January 2010, the Government of Jordan announced a partnership with Ingres Corporation (now named Actian), an open-source database-management company based in the United States, to promote open-source software use, starting with university systems in Jordan.[64]
Malaysia Malaysia launched the "Malaysian Public Sector Open Source Software Program", saving millions on proprietary software licenses until 2008.[65][66]
Peru In 2005, the Government of Peru voted to adopt open source across all its bodies.Lua error: not enough memory.Lua error: not enough memory. 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."[67]
Uganda In September 2014, the Uganda National Information Technology Authority (NITA-U) announced a call for feedback on an Open Source Strategy & Policy[68] at a workshop in conjunction with the ICT Association of Uganda (ICTAU).
United States In February 2009, the White House moved its website to Linux servers using Drupal for content management.Lua error: not enough memory.Lua error: not enough memory. In August 2016, the United States government announced a new federal source code policy which mandates that at least 20% of custom source code developed by or for any agency of the federal government be released as open-source software (OSS).[69] In addition, the policy requires that all source code be shared between agencies. The public release is under a three-year pilot program and agencies are obliged to collect data on this pilot to gauge its performance. The overall policy aims to reduce duplication, avoid vendor 'lock-in', and stimulate collaborative development. A new website Lua error: not enough memory.Lua error: not enough memory. provides "an online collection of tools, best practices, and schemas to help agencies implement this policy", the policy announcement stated. It also provides the "primary discoverability portal for custom-developed software intended both for Government-wide reuse and for release as OSS".[69] As yet unspecified OSS licenses will be added to the code.[70]
Venezuela 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 2009Lua error: not enough memory., the transition was still under way.[71][72]Lua error: not enough memory.

Adoption by supranational unions and international organizations

European Union

"We migrated key functions from Windows to Linux because we needed an operating system that was stable and reliable -- one that would give us in-house control. So if we needed to patch, adjust, or adapt, we could."

Official statement of the United Space Alliance, which manages the computer systems for the International Space Station (ISS), regarding why they chose to switch from Windows to Linux on the ISS.Lua error: not enough memory.Lua error: not enough memory.Lua error: not enough memory.Lua error: not enough memory.

Lua error: not enough memory.

In 2017, the European Commission stated that "EU institutions should become open source software users themselves, even more than they already are" and listed open source software as one of the nine key drivers of innovation, together with big data, mobility, cloud computing and the internet of things.[73]

In 2020 the European Commission adopted its Open Source Strategy 2020-2023,[74] including encouraging sharing and reuse of software and publishing Commission's source code as key objectives. Among concrete actions there is also to set up an Open Source Programme Office in 2020[75] and in 2022 it launched its own FOSS repository https://code.europa.eu/.[76]

In 2021 the Commission Decision on the open source licensing and reuse of Commission

software (2021/C 495 I/01)[77] was adopted, under which, as a general principle, the European Commission may release software under EUPL or another FOSS license, if more appropriate. There are exceptions though.

In May 2022[78] the Expert group on the Interoperability of European Public Services came published 27 recommendations to strengthen the interoperability of public administrations across the EU. These recommendations are to be taken into account later in the same year in Commission's proposal of the "Interoperable Europe Act".

Production

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Issues and incidents

GPLv3 controversy

Lua error: not enough memory. 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 Digital Millennium Copyright Act (DMCA), the Free Software Foundation released version 3 of its GNU Public License (GNU GPLv3) in 2007 that explicitly addressed the DMCA and patent rights.

After the development of the GNU GPLv3 in 2007, the FSF (as the copyright holder of many pieces of the GNU system) updated manyLua error: not enough memory. of the GNU programs' licenses from GPLv2 to GPLv3. On the other hand, the adoption of the new GPL version was heavily discussed in the FOSS ecosystem,[79] several projects decided against upgrading to GPLv3. For instance the Linux kernel,[80][81] the BusyBox[82][83] project, AdvFS,[84] Blender,[85] and the VLC media player decided against adopting the GPLv3.[86]

Apple, a user of GCC and a heavy user of both DRM and patents, switched the compiler in its Xcode IDE from GCC to Clang, which is another FOSS compilerLua error: not enough memory.Lua error: not enough memory. but is under a permissive license.[87] LWN speculated that Apple was motivated partly by a desire to avoid GPLv3.Lua error: not enough memory.Lua error: not enough memory. The Samba project also switched to GPLv3, so Apple replaced Samba in their software suite by a closed-source, proprietary software alternative.Lua error: not enough memory.Lua error: not enough memory.

Skewed prioritization, ineffectiveness and egoism of developers

Lua error: not enough memory. Leemhuis criticizes the prioritization of skilled developers who − instead of fixing issues in already popular open-source applications and desktop environments − create new, mostly redundant software to gain fame and fortune.[88]

He also criticizes notebook manufacturers for optimizing their own products only privately or creating workarounds instead of helping fix the actual causes of the many issues with Linux on notebooks such as the unnecessary power consumption.[88]

Commercial ownership of open-source software

Mergers have affected major open-source software. Sun Microsystems (Sun) acquired MySQL AB, owner of the popular open-source MySQL database, in 2008.[89]

Oracle in turn purchased Sun in January 2010, acquiring their copyrights, patents, and trademarks. Thus, Oracle became the owner of both 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.Lua error: not enough memory.Lua error: not enough memory. 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.Lua error: not enough memory.Lua error: not enough memory. All of these have distinct names; they are distinct projects and cannot use the trademarked name MySQL.Lua error: not enough memory.Lua error: not enough memory.

Legal cases

Oracle v. Google

Lua error: not enough memory. In August 2010, Oracle sued Google, claiming that its use of Java in Android infringed on Oracle's copyrights and patents. In May 2012, the trial judge determined that Google did not infringe on Oracle's patents and 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.Lua error: not enough memory.Lua error: not enough memory. Oracle appealed to the Federal Circuit, and Google filed a cross-appeal on the literal copying claim.Lua error: not enough memory.Lua error: not enough memory.

As part/driver of a new socio-economic model

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By defying ownership regulations in the construction and use of information—a key area of contemporary growth—the Free/Open Source Software (FOSS) movement counters neoliberalism and privatization in general.[90][91]

By realizing the historical potential of an "economy of abundance" for the new digital world, FOSS may lay down a plan for political resistance or show the way towards a potential transformation of capitalism.[91]

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.Lua error: not enough memory.Lua error: not enough memory.

See also

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Lua error: not enough memory.

Notes

  1. ↑ FOSS is an inclusive term that covers both free software and open-source software, which despite describing similar development models, have differing cultures and philosophical backgrounds.Lua error: not enough memory.Lua error: not enough memory. Free refers to the users' freedom to copy and re-use 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". (See Lua error: not enough memory.) 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.Lua error: not enough memory.Lua error: not enough memory. FOSS is a term that can be used without particular bias towards either political approach.

Lua error: not enough memory.Lua error: not enough memory.

References

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  19. ↑ Object code only: is IBM playing fair? Lua error: not enough memory. IBM's OCO policy protects its own assets but may threaten customers investment on Computerworld - 8 Febr. 1988
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  • Lua error: not enough memory.
  • Lua error: not enough memory.
  • Lua error: not enough memory.
  • Lua error: not enough memory.
  • Lua error: not enough memory.
  • Lua error: not enough memory.
  • Lua error: not enough memory.
  • Lua error: not enough memory.
  • Lua error: not enough memory.

Further reading

  • Lua error: not enough memory.
  • Lua error: not enough memory.
  • Lua error: not enough memory.
  • Lua error: not enough memory.
  • Lua error: not enough memory.

FLOSS Concept Booklet FOSS A General Introduction

Lua error: not enough memory. Lua error: not enough memory.

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