Open Source And Industry Alliance (OSAIA)
10/14/2015Promoted and advocated for the interests of the open source community *Inactive
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Open Source Applications Foundation (OSAF)
10/14/2015Promoted wide adoption of Open-Source application software.
Open Source Development Lab (OSDL)
10/14/2015Developed data center and telco class enhancement open source Linux developers *Merged with The Free Standards Group in 2007 to form The Linux Foundation
Open Source Geospatial Foundation (OSGeo)
10/14/2015Promotes and supports the collaborative development of open source geospatial software, and promotes its widespread use.
Open Source Hardware Association (OSHWA)
10/29/2014Promotes the expansion of open source hardware.
Open Source Initiative (OSI)
1/01/2019Promotes and manages the Open Source definition and provides related licensing certification.
Open Source Software Institute (OSSI)
10/14/2015Promotes the development and implementation of open-source software solutions.
Open Standard for Public Transportation Alliance (OSPT)
10/14/2015Developed and promotes CIPURSE, an open standard secure transit fair collection solution.
Open Standards Consortium for Real Estate (OSCRE)
10/14/2015Promotes a real estate data standard.
Open SystemC Initiative (OSCI)
10/14/2015Promoted and supported an advanced SystemC as an open source standard for system-level design *Merged with Accellera in 2011 to form Accellera Systems Initiative