High Quality Content by WIKIPEDIA articles! Monochrome BBS, known to users as "Mono," is a text-based multi-user bulletin board system featuring thousands of discussion files, along with games, instant and deferred user messaging, and a talker. It is one of the only BBS`s still in operation and actively used on a daily basis by its community, with over 5000 comments in a typical month. Monochrome runs on custom software, making the platform and user experience distinct from other bulletin board systems.