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

BS2000
       BetriebsSystem 2000 (SNI, OS)


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

BS2000

    An operating system from SNI for
   mainframes.

   (http://mch.sni.de.public/bs2000/server.htm).

   (1997-06-13)