Sun Industry Standards Source License

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The Sun Industry Standards Source License (SISSL) is a now-retired free and open source license, recognized as such by the Free Software Foundation and the Open Source Initiative (OSI). Under SISSL, developers could modify and distribute source code and derived binaries freely. Furthermore, developers could choose to keep their modifications private or make them public.

Several open source projects funded by Sun Microsystems were licensed under SISSL, including OpenOffice.org, and Sun GridEngine. Later versions of Openoffice.org were dual-licensed under the SISSL and LGPL until the retirement of the SISSL, at which time Openoffice.org was relicensed only under the LGPL. Sun GridEngine appears to still be covered by the SISSL.

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Sun retires the Sun Industry Standards Source License

Sun announced the retirement of the license on September 2, 2005. The director of Sun's Open Source Office said he will ask the OSI to put the SISSL on the "not recommended" list. OpenOffice.org 2.0 code, for example, is now licensed exclusively under the LGPL. Sun has developed the Common Development and Distribution License, a variant of the Mozilla Public License and has since released OpenSolaris and the Glassfish_Application_Server under that license.