My BBS was a hub for three BBS networks. I ran a 4-node BBS from 1985 to the early 1990s. My first computer was a Coleco Adam, and my second was a TRS-80, both of which used cassette tapes. I used two different computers to run my BBS. First I ran it in DOS, using a program that emulated multi-tasking by switching rapidly back and forth. I can't remember the name of that right now, but it worked well. Microsoft later stole it, and had to pay a settlement for doing so. Then I ran my BBS using Windows 1.0, and upgraded the OS a few times before switching to OS/2 when it came out. Although OS/2 never made it as an operating system, it was ideal for a BBS. Running my BBS through Windows, it crashed constantly. It had run better under DOS. I hated even to go to a restaurant, knowing that the BBS would likely be down when I returned. Running OS/2, it was up for years without a crash, as smooth as could be. I charged $50 a year for membership in my BBS, and my phone bills ranged from $300-500 per month, and I did a little less than break even; the BBS was costing me money but I enjoyed it so it was worth it. I probably could have stayed in the black if I didn't do so many packet transfers. A lot of BBS's only sent data out and received new data after midnight, when the LD costs were lower, but I also did a mid-day transfer so that my users would have fresher content, and sometimes did multiple transfers per day. It was set to automatically do a transfer at 2:00 a.m. and 1:00 p.m. but I sometimes forced a transfer in between.