I got my first modem in 1990 or thereabouts. For some reason there was still a lot of XModem use back then, but it was gradually replaced by ZModem. Some years

I got my first modem in 1990 or thereabouts. For some reason there was still a lot of XModem use back then, but it was gradually replaced by ZModem. Some years later, just before BBSes were obsoleted by the internet, several multiplexing protocols appeared which let you chat or play a MUD while downloading or even upload and download at the same time. Can't remember any names, but these protocols were only popular for a very brief time before the internet took over. I also recall some BBSes survived a while into the internet age by adding telnet ports. You ran your normal dialer software with a telnet driver that took the hostname as the phone number and then would end up running ZModem and the likes over telnet.