the Arpa Net connected just about every college in the US (and two in Britain, about 100 nodes total). We had to walk 5 miles each way in the snow (or take the intercampus bus) to a secure terminal to login to it.
None of this new-fangled 'Dialup' or 'Broadband'. There weren't any 'pictures' (html had not been invented yet). Used instant chat, didn't use email as not too many people to talk to.
We played Adventure and Zork after hours on MIT's Dec cluster, and learned math on Macsyma symbolic math system. It was slow compared to today but we thought it was fast!
The only mainframe around was a system-360 which we used with punch cards. Then they came out with credit card sized punch cards, and we were overjoyed! X-ray diffraction calculations could take 8 hours and we loved it!
A color display plus dec-system to render a 3-d protein could cost $50,000, and we'd have to program in Fortran, not this coffee-java-thang-language!
We wrote our lessons on a TRS-80 slate computer (with charcoal?) My first desktop computer had 64K of memory and I was happy, not like you young-uns with 2 gigs. Portable computers weight 30 pounds in a huge clamshell, and WE LIKED IT!
Think I'll totter off to the old -computer's museum now...