MSS meaning in Computing ?

Microsoft Search Server (MSS) was an enterprise search platform from Microsoft, based on the search capabilities of Microsoft Office SharePoint Server. MSS shared its architectural underpinnings with the Windows Search platform for both the querying engine and the indexer. Microsoft Search Server was once known as SharePoint Server for Search.

Microsoft Search Server was made available as Search Server 2008, which was released in the first half of 2008. In 2010, Search Server 2010 http://www.microsoft.com/enterprisesearch/searchserverexpress/en/us/technical-resources.aspx became available, including a free version, named Search Server 2010 Express. The express edition featured the same feature-set as the commercial edition, including no limitation on the number of files indexed; however, it was limited to a stand-alone installation and could not be scaled out to a cluster. A release candidate of Search Server Express 2008 was made available on November 7, 2007 and was scheduled to Release to Manufacturing (RTM) in sync with Search Server 2008.

A more detailed comparison of the feature differences between Search Server 2008, Search Server 2010, and Search Server 2010 Express can be found at http://www.microsoft.com/enterprisesearch/searchserverexpress/en/us/compare.aspx