programmable airline reservation system

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

Programmable Airline Reservation System
PARS

   <application> (PARS) An {IBM} proprietary large scale airline
   reservation application, executing under the control of IBM's
   {ACP} (and later its successor, {TPF}).

   In the early days of automated reservations systems in the
   1960s and 1970s the combination of ACP and PARS provided
   unprecendented scale and performance from an on-line
   {real-time} system, and for a considerable period ranked among
   the largest networks and systems of the era.

   {IPARS} was the international version.

   (1999-01-18)