Source : Free On-Line Dictionary of Computing

Storage Management Services
     
         (SMS) Software that enables network administrators
        to route {backup} data from various devices on a network to
        another device such as a server or a {magnetic tape} backup
        unit.  This is done either to make use of a high-capacity
        storage system such as a tape {juke-box} or for disaster
        protection.
     
        (1996-02-18)