Back in the mid-late 1990s, an Internet-based BBS platform called Hotline sprung up and quickly spread throughout the Macintosh community. It was basically a client/server BBS software suite that allowed for multi-user chat, file transfers, and message boards.
By the early 2000s, though, Hotline had mostly died out. Today, only a handful of servers remain. But guess what? You can still connect to them — on Windows or a Mac. A new article I wrote for Macworld, "Hotline Revisted," tells you how.
Have fun. Remember to be kind to the Hotline veterans when you visit.