MOSS may refer to: Map Overlay and Statistical System, Early public domain GIS system Market Oriented Sector Selective talks, trade negotiations held between the United States and Japan in 1984 Measure of software similarity, a software package developed at UC Berkeley for detecting plagiarism in computer programming and other assignments Microsoft Office SharePoint Server, the current version of what used to be known as SharePoint Portal Server MIME Object Security Services, a historic status I… (More on Moss)