DVMUG’s BBS runs on software called FirstClass. It is recommended that you download the “client”--user--software to connect to the BBS server.
For macOS 10.11 to 12.0
DVMUG BBS 16.201a (23 Mb)
The server for the DVMUG BBS is: fc.dvmug.org
You can download the FirstClass Client for Windows computers here