WE HAD COMPUTERS AT COLLEGE THEN. I WAS A SECRETARY. I DON’T KNOW IF STUDENTS DID. I MADE MONEY TYPING THEIR PAPERS.
We had a mainframe at work but I don't think the use of personal computers became prevalent until much later in the decade.
IIRC, MS Dos wasn't introduced until 1981-82 and Windows not until 1985.
All this said, I think this "roommate's" comment about PC's detracts from the veracity of his account...just doesn't pass the smell test.