cics

from The Free On-line Dictionary of Computing (8 July 2008)

Customer Information Control System
CICS

   <communications, database> (CICS) An {IBM} communications
   system that was converted for {database} handling.

   [Huh?]

   (1994-11-29)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

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