Open source promotes universal access via an open-source or free license to a product's design or blueprint, and universal redistribution of that design or blueprint. Before the phrase open source became widely adopted, developers and producers used a variety of other terms. Open source gained hold with the rise of the Internet. The open-source software movement arose to clarify copyright, licensing, domain, and consumer issues.
An open-source license is a type of license for computer software and other products that allows the source code, blueprint or design to be used, modified and/or shared under defined terms and conditions. This allows end users and commercial companies to review and modify the source code, blueprint or design for their own customization, curiosity or troubleshooting needs. Open-source licensed software is mostly available free of charge, though this does not necessarily have to be the case. Licenses which only permit non-commercial redistribution or modification of the source code for personal use only are generally not considered as open-source licenses. However, open-source licenses may have some restrictions, particularly regarding the expression of respect to the origin of software, such as a requirement to preserve the name of the authors and a copyright statement within the code, or a requirement to redistribute the licensed software only under the same license (as in a copyleft license). One popular set of open-source software licenses are those approved by the Open Source Initiative (OSI) based on their Open Source Definition (OSD).
Social and political views have been affected by the growth of the concept of open source. Advocates in one field often support the expansion of open source in other fields. But Eric Raymond and other founders of the open-source movement have sometimes publicly argued against speculation about applications outside software, saying that strong arguments for software openness should not be weakened by overreaching into areas where the story may be less compelling. The broader impact of the open-source movement, and the extent of its role in the development of new information sharing procedures, remain to be seen.
Generally, open source refers to a computer program in which the source code is available to the general public for use for any (including commercial) purpose, or modification from its original design. Open-source code is meant to be a collaborative effort, where programmers improve upon the source code and share the changes within the community. Code is released under the terms of a software license. Depending on the license terms, others may then download, modify, and publish their version (fork) back to the community.
Beginning with the Open Siddur Project in 2009, open-source projects in Judaism began to publicly share their software code with open-source licenses and their content with free-culture compatible open content licenses. The explicit objectives of these projects also began to differ from Rushkoff's "Open Source Judaism." Rather than seek reforms in religious practices or doctrines, these projects used Open Content licenses to empower users to access and create their own resources from a common store of canonical texts and associated translations and metadata. By 2012, open-source projects in Judaism were mainly active in facilitating collaboration in sharing resources for transcribing and translating existing works in the Public Domain, and for adaptation and dissemination of works being shared by copyright owners under Open Content licenses.
Although a work of radical 1960s Jewish counterculture rather than an explicitly religious work, the satirical songbook Listen to the mocking bird (Times Change Press, 1971) by the Fugs' Naphtali "Tuli" Kupferberg contains the earliest explicit mention of "copyleft" in a copyright disclaimer. Later open-source efforts in Judaism begin to appear in 1988 with the free software code written for calculating the Hebrew calendar included in Emacs. After the popularization of the term "open-source" in 1998, essays and manifestos linking open-source and Judaism began appearing in 2002 among Jewish thinkers familiar with trends in new media and open-source software. In August 2002, Aharon Varady proposed the formation of an "Open Siddur," an open-source licensed user-generated content project for digitizing liturgical materials and writing the code needed for the web-to-print publishing of Siddurim (Jewish prayer books). Meanwhile, media theorist Douglas Rushkoff began articulating his understanding of open-source in Judaism. "The object of the game, for me," Rushkoff explained, "was to recontextualize Judaism as an entirely Open Source proposition."
The term "Open Source Judaism" first appeared in Douglas Rushkoff's book Nothing Sacred: The Truth about Judaism (2003). Rushkoff employed the term "Open Source" to describe a democratic organizational model for collaborating in a commonly held source: the Hebrew Bible and other essential works of Rabbinic Judaism. Rushkoff conceived of Judaism as essentially an open-source religion which he conceived as, "the contention that religion is not a pre-existing truth but an ongoing project. It may be divinely inspired, but it is a creation of human beings working together. A collaboration." For Rushkoff, open-source offered the promise of enacting change through a new culture of collaboration and improved access to sources. "Anyone who wants to do Judaism should have access to Judaism. Judaism is not just something that you do, it's something you enact. You've got to learn the code in order to alter it." The 2003 publication of Rushkoff's book Nothing Sacred: The Truth about Judaism and an online forum dedicated to "Open Source Judaism" inspired several online projects in creating web applications for generating custom made haggadot for Passover, however neither content nor code for these were shared under free-culture compatible open content terms.
A guide has been published (Open-Source Lab (book) by Joshua Pearce) on using open-source electronics and 3D printing to make open-source labs. Today scientists are creating many such labs, examples include:
The term "Open Source Judaism" first appeared in Douglas Rushkoff's book Nothing Sacred: The Truth about Judaism (2003). Rushkoff employed the term "Open Source" for Judaism in describing a democratic organizational model for collaborating in a commonly held religio-cultural source code: the Oral and Written Torah. Rushkoff conceived of Judaism as essentially an open-source religion which he understood as, "the contention that religion is not a pre-existing truth but an ongoing project. It may be divinely inspired, but it is a creation of human beings working together. A collaboration." For Rushkoff, Open Source offered the promise of enacting change through a new culture of collaboration and improved access to sources. "Anyone who wants to do Judaism should have access to Judaism. Judaism is not just something that you do, it's something you enact. You've got to learn the code in order to alter it."
Early confusion over the means by which "open-source" projects collaborate, led some Jewish social entrepreneurs inspired by Rushkoff's idea to develop their work without indicating a license, publicly sharing code, or attributing content. Others offered "Open Source" as a model to be emulated but expressed no understanding of the role open-source licensing played in open-source collaboration and no opinion as to what role said licenses might serve for an Open Source Judaism. Many advocates for the adoption of Open Source in Judaism now work to clarify the meaning of "open" and "free," and to convince projects soliciting user-generated content to adopt free-culture compatible Open Content licensing.
The open-source-software 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. 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. 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.
Rushkoff's vision of an Open Source Judaism was comparable to some other expressions of open-source religion explicitly advocating for doctrinal reform or change in practice. As an expression of Open Source Judaism, in 2002 Rushkoff founded a movement called Reboot. "The object of the game, for me, was to recontextualize Judaism as an entirely Open Source proposition." (Rushkoff subsequently left Reboot when he felt its funders had become more concerned with marketing and publicity of Judaism than its actual improvement and evolution. )
Instead of rallying around Open Source as a means towards religious reform as Rushkoff suggested, other open-source Jewish projects strive to present their work as non-denominational and non-prescriptive. They see free-culture and open-source licensing as a practical means towards preserving culture, improving participation, and supporting educational objectives in an era of shifting media formats and copyright restrictions. In an interview with the Atlantic Magazine, the founder of the open-source Open Siddur Project, Aharon Varady, explained, :: "...I was interested in how free culture and open-source licensing strategies could help improve access and participation in the creative content I inherited from my ancestors in just that age when it was all transitioning from an analog print format to a searchable digital one. To me it seemed both obvious and necessary to pursue the digitization of existing works in the public domain, and broaden the network of students, scholars, practitioners, and communities that were already adopting, adapting, and distributing their inspired creativity and scholarship -- but were only doing so in the highly restricted channel of copyrighted work....The essential problem is how to keep a collaborative project like Judaism culturally vital, in an age when the creative work of participants in the project -- prayers, translations, commentaries, songs, etc. -- are immediately restricted from creative reuse by "All Rights Reserved" copyright. The fact is that broad creative engagement in collaborative projects isn't only limited by technological forces: these can be and have been overcome. They are limited by legal forces that assume creatives have only a proprietary interest in their work."
The open-source model is a decentralized software development model that encourages open collaboration, meaning "any system of innovation or production that relies on goal-oriented yet loosely coordinated participants who interact to create a product (or service) of economic value, which they make available to contributors and noncontributors alike." A main principle of open-source software development is peer production, with products such as source code, blueprints, and documentation freely available to the public. The open-source movement in software began as a response to the limitations of proprietary code. The model is used for projects such as in open-source appropriate technology, and open-source drug discovery.
The open-source movement has inspired increased transparency and liberty in biotechnology research, for example by open therapeutics and CAMBIA Even the research methodologies themselves can benefit from the application of open-source principles. It has also given rise to the rapidly-expanding open-source hardware movement.
Examples of free software license / open-source licenses include Apache License, BSD license, GNU General Public License, GNU Lesser General Public License, MIT License, Eclipse Public License and Mozilla Public License.
Some open-source vehicles, such as the PUUNK velomobile, the Hypertrike, and the Xtracycle, are technically not automobiles.
When an author contributes code to an open-source project (e.g., Apache.org) they do so under an explicit license (e.g., the Apache Contributor License Agreement) or an implicit license (e.g. the open-source license under which the project is already licensing code). Some open-source projects do not take contributed code under a license, but actually require joint assignment of the author's copyright in order to accept code contributions into the project.
The proliferation of open-source licenses is a negative aspect of the open-source movement because it is often difficult to understand the legal implications of the differences between licenses. With more than 180,000 open-source projects available and more than 1400 unique licenses, the complexity of deciding how to manage open-source use within "closed-source" commercial enterprises has dramatically increased. Some are home-grown, while others are modeled after mainstream FOSS licenses such as Berkeley Software Distribution ("BSD"), Apache, MIT-style (Massachusetts Institute of Technology), or GNU General Public License ("GPL"). In view of this, open-source practitioners are starting to use classification schemes in which FOSS licenses are grouped (typically based on the existence and obligations imposed by the copyleft provision; the strength of the copyleft provision).
Numerous companies have created businesses around open-source software. They do this by publishing all of their code open-source, then charging for training, certifications, add-ons, and other services. One example is Red Hat, which produces operating systems. Red Hat sells services such as 24/7 support, integration into company's products, and training. Red Hat was the pioneer for the open source business model, and was valued at approximately $16 billion as of April 2017. Other examples include Mozilla, which created the web browser Firefox, and Google, which created Android, an open-source mobile operating system based on Linux.