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OSS is defined by publicly available source code and permissions (usually via licenses) to use, modify, and redistribute it, commonly aligned with the OSI Open Source Definition.
Open-source software (OSS) is computer software whose source code is publicly available. This openness lets users use, study, modify, and distribute the software, typically under an open-source license (or, less commonly, via dedication to the public domain). OSS is often defined using the Open Source Definition (OSD) created by the Open Source Initiative (OSI), which requires that the software be distributed under licenses meeting specific criteria, including non-discrimination and permission to use, modify, and redistribute. The meaning of “open source” is not without controversy. The OSI definition is widely used, but the term is shaped by social convention rather than legal control, and disputes arise over ethical versus commercial motivations, especially in relation to the “free software” movement. Public-domain software is also debated: some argue it is effectively open source, while others say it should not be treated as such because it lacks a formal license and rights can vary by jurisdiction. These semantic conflicts have led to related terms such as source-available, fair source, ethical source, shared source, and “fauxpen source.”
OSS is defined by publicly available source code and permissions (usually via licenses) to use, modify, and redistribute it, commonly aligned with the OSI Open Source Definition.
The term “open source” is socially defined and contested, with ongoing disputes about how it relates to “free software,” public-domain software, and the ethical versus commercial intent behind licensing choices.
Software whose source code is publicly available and can be used, studied, modified, and redistributed under open terms, usually an open-source license.
A set of criteria maintained by the Open Source Initiative that licenses must satisfy for software to be considered open source.
The organization that created and maintains the Open Source Definition and maintains a list of licenses approved as conforming to it.
A software movement emphasizing user freedoms (not price), often associated with the Free Software Foundation’s view that “open source” can be misleading if treated as equivalent.
Software where source code is available to view, but not necessarily under the full set of rights required for it to qualify as open source.
Software without a formal license granting rights, where whether it counts as open source is disputed due to jurisdiction-dependent rights.
“Can you explain what "OSS is defined by publicly available source code and permissions (usually via licenses) to use, modify, and redistribute it, commonly aligned with the OSI Open Source Definition." means in simple terms?”