Eric S. Raymond in the context of NetHack

Open-source licenses are software licenses that allow content to be used, modified, and shared. They facilitate free and open-source software (FOSS) development. Intellectual property (IP) laws restrict the modification and sharing of creative works. Free and open-source licenses use these existing legal structures for an inverse purpose. They grant the recipient the rights to use the software, examine the source code, modify it, and distribute the modifications. These criteria are outlined in the Open Source Definition.

After 1980, the United States began to treat software as a literary work covered by copyright law. Richard Stallman founded the free software movement in response to the rise of proprietary software. The term "open source" was used by the Open Source Initiative (OSI), founded by free-software developers Bruce Perens and Eric S. Raymond. "Open source" emphasizes the strengths of the open development model rather than software freedoms. While the goals behind the terms are different, open-source licenses and free-software licenses describe the same type of licenses.

Open collaboration refers to any "system of innovation or production that relies on goal-oriented yet loosely coordinated participants who cooperate voluntarily to create a product (or service) of economic value, which is made freely available to contributors and noncontributors alike." It is prominently observed in open source software, and has been initially described in Richard Stallman's GNU Manifesto, as well as Eric S. Raymond's 1997 essay, The Cathedral and the Bazaar. Beyond open source software, open collaboration is also applied to the development of other types of mind or creative works, such as information provision in Internet forums, or the production of encyclopedic content in Wikipedia.

The organizing principle behind open collaboration is that of peer production. Peer production communities are structured in an entirely decentralized manner, but differ from markets in that they function without price-based coordination, and often on the basis of volunteering only. Such communities are geared toward the production of openly accessible public or "common" goods, but differ from the State as well as charity groups in that they operate without a formal hierarchical structure, and rest solely on the construction of a rough, evolving consensus among participants.

The Open Source Initiative (OSI) is an American nonprofit organization that maintains The Open Source Definition (OSD), the predominant standard for open-source software. The organization was founded in February 1998 by Bruce Perens and Eric S. Raymond, part of a group inspired by the Netscape Communications Corporation publishing the source code for its flagship Netscape Communicator product. Later, in August 1998, the organization added a board of directors.

For most of its existence, the OSI's activities have been focused on the definition and certifying software licenses as compliant with it. OSI originally had a closed organizational model, but began to switch towards a membership organization in the 2010s to raise more money and expand its activities.

Bruce Perens (born around 1958) is an American computer programmer and advocate in the free software movement. He created The Open Source Definition and published the first formal announcement and manifesto of open source. He co-founded the Open Source Initiative (OSI) with Eric S. Raymond.

In 2005, Perens represented Open Source at the United Nations World Summit on the Information Society, at the invitation of the United Nations Development Programme. He has appeared before national legislatures and is often quoted in the press, advocating for open source and the reform of national and international technology policy.