Long long ago, in a time before dial up internet, there was a BBS in Calgary, Alberta, called the Nymphstar.
It ran on (to the best of my memory) an Apple ][, and had a 300 baud modem. The BBS software was custom. Users were grouped randomly onto ships. Each ship had it’s own message system where the crew could communicate. No other ships could see those internal message systems.
The sysop would read these and from time to time produce a fleet log that would greet you when you logged in. If you had been away for some time you may see multiple of these fleet logs scroll by to catch you up, before you could then participate in the shipboard messages.
I do not recall if there was a global message area. I do not think there was.
Depending on what the sysop saw was happening and felt like doing to mix things up, he would teleport crew between ships and watch their interactions.
This was a very unique experience.
Excerpts from the Nymphstar Fleet BBS Logs follow, Dec 1988 – Jan 1989