My first ISP was the original 'tenner a month' guys at
Demon in 1994.
They charged 10 quid a month for a static IP dial-up service where the customer had to pay for the BT calls.
I remember having to dial-in to their BBS to download bits of software which allowed me to run the connection - words like Trumpet windsock still send shivers down my spine.
MS DOS 6, then Windows 3.1, floppy discs - those were the days!
john