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The Open Source Initiative

The Open Source Initiative (OSI) is a non-profit corporation with global scope formed to educate about, and advocate, for the benefits of open source, and to build bridges among different constituencies in the open source community. See our about and history pages for more.

Open Source Licensing

The OSI maintains the Open Source Definition and the list of Open Source Initiative-approved licenses.

OSI Membership

OSI is in the process of transforming into a member-based organisation:

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News

September 6, 2012: Five New Affiliates join from around the world. Read more...

July 18, 2012: Individual Membership: The next step of OSI's transformation into a member organization starts today! You can become an Individual Member. Read more...

June 18, 2012: Affiliate News: OSI is very pleased to welcome AFUL, The Document Foundation, Outercurve, OW2 and The Wikimedia Foundation as OSI Affiliates. Additionally, OSI invites eligible open source organisations to apply to be come Affiliates. Read more...

March 30, 2012: New Affiliates: OSI is very pleased to welcome CENATIC and Debian to the Affiliate scheme for community groups. Read more...




Recent Activities

December 15, 2012: The Board are sad to hear of the sudden death of former OSI Board member Raj Mathur. Read more...

October 17, 2012: OSI and OSHWA Sign Agreement: OSI and the Open Source Hardware Association have signed an agreement clarifying their mutual trademark position. Read more...

August 10, 2012: OSI Signs Declaration of Internet Freedom Read more...

April 25, 2012: OSI joined with FSFE and others in a press statement to call for the UK government to use open-source-compatible open standards. Read more...

March 30, 2012: OSI now has a Google+ page. If you use Google+, please add it to one of your circles to stay up-to-date with our news.

January 18, 2012: The Open Source Initiative Board joined many other civil society organisations as co-signatories of this open letter expressing concern about SOPA and PIPA. Read more...