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

CICS
       Customer Information Control System (IBM, CICS, Z/OS, OS/390,
VSE/ESA)


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

Customer Information Control System
CICS

    (CICS) An IBM communications
   system that was converted for database handling.

   [Huh?]

   (1994-11-29)