V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ADM
       Add-Drop-Multiplexer


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

ADM

    A picture query language, extension of Sequel2.

   ["An Image-Oriented Database System", Y. Takao et al, in
   Database Techniques for Pictorial Applications, A. Blaser ed,
   pp. 527-538].

   (1995-03-21)