Source : WordNet®

disa
     n 1: any orchid of the genus Disa; beautiful orchids with dark
          green leaves and usually hooded flowers; much prized as
          emblematic flowers in their native regions
     2: a combat support agency in the Department of Defense
        responsible for developing and operating and supporting
        information systems to serve the needs of the President
        and the Secretary of Defense and the Joint Chiefs of Staff
        [syn: {Defense Information Systems Agency}]

Source : Free On-Line Dictionary of Computing

DISA
     
        1.  {Defense Information Systems Agency}.
     
        2.  {Data Interchange Standards Association}.
     
        (1999-09-18)