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

AS400
       Application System/400 (IBM), "AS/400"


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

AS/400

    An IBM minicomputer for small business and
   departmental users, released in 1988 and still in production
   in October 1998.

   Features include a menu-driven interface, multi-user
   support, terminals that are (in the grand IBM tradition)
   incompatible with anything else including the IBM 3270
   series, and an extensive library-based operating system.

   The machine survives because its API layer allows the
   operating system and application programs to take
   advantage of advances in hardware without recompilation and
   which means that a complete system that costs $9000 runs the
   exact same operating system and software as a $2 million
   system.  There is a 64-bit RISC processor operating system
   implementation.

   Programming languages include RPG, assembly language, C,
   COBOL, SQL, BASIC, and REXX.  Several CASE tools are
   available: Synon, AS/SET, Lansa.

   (http://as400.ibm.com/).

   (1999-07-26)