Yep - The Commordore Pet was 1977. Any geek who didn't have an acoustic coupler (or had nicked a modem from work) with one or a Trash-80 or the (even different then) Apple II wasn't worth knowing. OK networking was mostly chat on BBS but shoving documents around on BT Gold was pretty common by '84 as was email generally in the high tech trade.
Nope, the Acts were partly as a result of the earlier developments rather than being reversed engineered into it. Or did the writer sleep through a decade? Not too difficult after the rather more exciting substance enhancing sixties ;-)