Derleth: You’re drawing a distinction that probably doesn’t matter. A BBS is not defined by how you connect to it, or what it connects to. A BBS was/is the term for a collection of software that allows you to manage bulletin boards and file downloads. BBS’s later on migrated out to serve as ISPs, gateways to distributed message networks like Fidonet, etc.
How you connect is irrelevant. Back in the early days, CompuServe, The Source, and AOL were just very big BBSes. They ran on their own computers, had dial-up lines (and later, connections to packet switched networks), etc.
Look at CompuServe. It originally started as a large, self-contained BBS. Then it expanded nationwide by leasing bandwidth on commercial packet-switched networks with local dial-up lines in each city. Back then, to connect to CompuServe you had to have a modem and dial in directly, paying long distance charges, or you could use your modem to dial into a packet network gateway and pay the hourly packet charges (about $8/hr back then).
When the internet started to become commercially available instead of being restricted to academia, both BBS’s and large services like CompuServe and AOL started offering limited access to it in a variety of ways. The first was E-mail - you could send E-mail through many BBS’s and have it route through the internet to the destination you wanted. Then soon after, these services started adding limited newsgroup access. Web browsing didn’t come until much later.
As the web appeared and started becoming popular, BBS’s started to mutate to survive. Some were modified to act as dial-up hosts for newsgroup and mail access. Later, limited web browsing became available through them. Going the other way, BBS’s started offering Telnet access so you could log in through the internet, and eventually many of these products mutated into web servers.
The final nail in the coffin for BBSes as an industry was the release of free, high-quality web servers like Microsoft IIS and Apache, plus free programs for doing things like text indexing and FTP transfers. It became really hard to justify spending $400 for a BBS package when you could get the stuff for free.
Today, I think a BBS should be defined more as a collection of people. For example, the Straight Dope board is exactly like a BBS, except that you connect through the internet instead of dialing up. It has a community, software to bring them together, and a way for them all to connect and communicate. That’s what a BBS is. We just don’t call them that any more.