Opus-CBCS

Opus-CBCS (Opus Computer Based Conversation System) is a bulletin board system (BBS) program that runs under MS-DOS. It was popular from the mid-1980s through the 1990s.

Sample files

 * Sample message file

Software and documentation

 * Opus 1.73 files
 * Opus 1.79 files

Other links and references

 * History of Opus-CBCS
 * Opus-CBCS Wikipedia article