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version 1.0 See FAQs See list of endorsements See Checklist Endorse the OSAID Preamble Why we need Open Source Artificial Intelligence (AI) Open Source has demonstrated that massive benefits accrue to everyone after removing the barriers to learning, using, sharing and improving software systems. These benefits are the result of using licenses that adhere to the Open Source Definition. For AI, soc

Blue Oak Model License Version 1.0.0Submitted: November 9, 2023Submitter: Luis VillaApproved: January 19, 2024 Board minutes SPDX short identifier: BlueOak-1.0.0 Version 1.0.0 Purpose This license gives everyone as much permission to work with this software as possible, while protecting contributors from liability. Acceptance In order to receive this license, you must agree to its rules.  The rule

The SSPL is Not an Open Source License We’ve seen that several companies have abandoned their original dedication to the open source community by switching their core products from an open source license, one approved by the Open Source Initiative, to a “fauxpen” source license. The hallmark of a fauxpen source license is that those who made the switch claim that their product continues to remain

Microsoft Makes it Official: Becomes Sponsor of Open Source Initiative After years of increasing involvement and engagement in open source software projects and communities, Microsoft takes what may be their most dramatic step, joining the home of the open source software movement. PALO ALTO, Calif. - Sept. 26, 2017 -- The Open Source Initiative ® (OSI) the global non-profit dedicated to promoting

Over the last 19 years, the Open Source Initiative (OSI) has been the steward of the Open Source Definition (or OSD), establishing a common language when discussing what it means to be an Open Source license, and a list of licenses which are known to be compatible with the OSD. This is taken to its logic next step this year, with the OSI providing a machine readable publication of OSI approved lic

As a global non-profit, The Open Source Initiative (OSI) protects and promotes open source software, development and communities, championing software freedom in society through education, collaboration, and infrastructure, stewarding the Open Source Definition (OSD), and preventing abuse of the ideals and ethos inherent to the open source movement. See our about and history pages for more. Open s

To Microsoft, Open Source means "Windows Encumbered" One of the most interesting things to happen in the past couple of years, is Microsoft's embrace of Open Source. This means different things to various people I've spoken with at Microsoft. Some seem genuinely sincere. Some seem less so. What hasn't changed is Microsoft's behavior to the Open Source community at large. They have not retracted th

IPA Font License Version 1.0Submitted: February 4, 2009Submitter: Yuko Noguchi, URL N/AApproved: April 1, 2009 Board minutes SPDX short identifier: IPA The Licensor provides the Licensed Program (as defined in Article 1 below) under the terms of this license agreement (“Agreement”).  Any use, reproduction or distribution of the Licensed Program, or any exercise of rights under this Agreement by a

Educational Community License, Version 2.0 Version 2.0Submitted: May 21, 2007Submitter: Christopher D. CoppolaApproved: June 6, 2007 Board minutes SPDX short identifier: ECL-2.0 The Educational Community License version 2.0 (“ECL”) consists of the Apache 2.0 license, modified to change the scope of the patent grant in section 3 to be specific to the needs of the education communities using this li

Open Source Licenses by Category Page created on September 19, 2006 | Last modified on November 2, 2022 License Index License Approval Process License Information Origins and definitions of categories from the License Proliferation Committee report In the lists below, a parenthesized expression following a license name is its SPDX short identifier, if one exists, except for two items in the first

Copyright (c) <year> <copyright holders> This software is provided ‘as-is’, without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictio

Artistic License 2.0 Version 2.0Submitted: March 14, 2007Submitter: Allison RandalApproved: June 6, 2007 Board minutes SPDX short identifier: Artistic-2.0 Copyright (c) 2000-2006, The Perl Foundation. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble This license establishes the terms under which a given free software Pa

Submitted by Michael Tiemann on Sat, 2008-02-02 03:50 On January 31st 2008, Mary Jo Foley posted an insightful blog about Microsoft's Open Source Strategy. On the morning of February 1st 2008, Microsoft announced an unsolicited bid of $44.6B hostile for Yahoo!, and by the end of the day, Microsoft had lost $20B in market capitalization. Where does this leave Microsoft's open source strategy and th

History of the Open Source Initiative Page created on September 19, 2006 | Last modified on June 3, 2025 Development based on the sharing and collaborative improvement of software source code has a history essentially as long as software development itself. In the late 1990s, interest and participation in this phenomenon increased markedly with mainstream recognition of Linux in publications like

The Open Source Definition (Annotated) Page created on July 24, 2006 | Last modified on February 16, 2024 The sections below appear as annotations to the Open Source Definition (OSD) and are not a part of the OSD. A plain version of the OSD without annotations can be found here. Introduction Open source doesn’t just mean access to the source code. The distribution terms of open source software mus

The Open Source Definition Page created on July 7, 2006 | Last modified on February 16, 2024 Introduction Open source doesn’t just mean access to the source code. The distribution terms of open source software must comply with the following criteria: 1. Free Redistribution The license shall not restrict any party from selling or giving away the software as a component of an aggregate software dist

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subj

OSI Approved Licenses Open source licenses are licenses that comply with the Open Source Definition – in brief, they allow software to be freely used, modified, and shared. To be approved by the Open Source Initiative (also known as the OSI) a license must go through the Open Source Initiative’s license review process.

International Non-Reusable Other/Miscellaneous Popular / Strong Community Redundant with more popular Special Purpose Superseded Uncategorized Voluntarily retired clear categories