Cambridge Algebra System
Cambridge Algebra System is a computer [algebra system] written in Cambridge University by David Barton, Steve Bourne, and John [Fitch |John Fitch]. It was initially used for computations in celestial mechanics and general relativity. The foundation code was written in Titan computer assembler. In 1973, when Titan was replaced with an IBM [System/370 Model 165], it was rewritten in ALGOL 68C and then BCPL where it could run on IBM mainframes and assorted microcomputers.