GAP
Groups Algorithms and Programming.
A system for {symbolic mathematics} for computational discrete
algebra, especially group theory, by Johannes Meier, Alice
Niemeyer, Werner Nickel, and Martin Schonert of Aachen. GAP
was designed in 1986 and implemented 1987. Version 2.4 was
released in 1988 and version 3.1 in 1992.
{Sun version (ftp://ftp.math.rwth-aachen.de/pub/gap)}
["GAP 3.3 Manual, M. Schonert et al, Lehrstuhl D Math, RWTH
Aachen, 1993].
(1995-04-12)