Compuserve was the first thing I dialed with my 1200 baud modem, back in 1988. I still have one of the original "sign up kits" at my parents' house!
By the way, your 1200 bps modem was actually 600 baud! People often use baud and bps interchangeably but they're different. The most common 1200 bps standard was v.22 which used 600 baud.
https://en.wikipedia.org/wiki/List_of_ITU-T_V-series_recomme...
Introduction To Time Shared Systems (June 1972):
https://publications.gc.ca/collections/collection_2020/isde-...
>Apparently, there's a rough rule-of-thumb formula that the cost of a modem is about a dollar per baud. This estimate accounts for the extras that are usually added as rated speed is increased to give the device its 1-m1*in-turn utility.
$1.2 * 10^2 vs $1.4 * 10^9.