Also see glossary item OSS (i) a joint term sometimes used when refering to the Free Software and Open Source communities as a whole without differentiating between the terms and the matching philosophies. www.libervis.com (ii) an acronym that is most often used in English-speaking military software communities.The acronym was first used in a 2003 MITRE report that documented widespread use of, and reliance on, free software and open source software in the United States Department of Defense. www.wikipedia.org