MOSS may refer to: Market Oriented Sector Selective talks, trade negotiations held between the United States and Japan in 1984 Microsoft Office SharePoint Server 2007, the current version of what used to be known as SharePoint Portal Server MIME Object Security Services, a historic status IETF security protocol Mobile submarine simulator, a sonar decoy Moron Optical Space Surveillance, a United States Air Force system at Morón Air Base, Spain Multi-Oscillator Synthesis System, elect… (More on Moss)