IBM and Compatibles: DOS: COLOSSUS
Author: Dan Plunkett, John Friel III, Jim Harrer, Scott Hunter
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Additional Notes:
Colossus: The Forbin Project was a rather advanced BBS program created by a very young Dan Plunkett. Well-documented, fast, and extensible, the program had great potential.

A falling-out between Plunkett and his beta testers resulted in the testers forking the project and starting what would eventually become Wildcat!, from Mustang Software. (172K) Colossus: The Forbin Project BBS Version 1.0 (November, 1985)
colossus.txt (100K) Colossus: The Forbin Project Documentation (November, 1985)