The Free On-line Dictionary of Computing (30 December 2018):

IDMS

   1.  A pictorial query language,
   an extension of Sequel2.

   ["A Management System for an Integrated Database of Pictures
   and Alphanumeric Data", G.Y. Tang, Computer Graphics Image
   Processing 16:270-286 (1981)].

   2.  Integrated Database Management System.

   (2002-06-10)