It was actually pretty common at the time. At my school, we used electrographic cards (basically a cross between a punch card and a MarkSense test card, where y

It was actually pretty common at the time. At my school, we used electrographic cards (basically a cross between a punch card and a MarkSense test card, where you coloured in the dots with an Electrographc (#2, HB) pencil¹). We used either the local university's computer or one of INCO's, depending on their own needs at the time. (Not ony were computers expensive, they were also quite slow, so INCO's would be off-limits during quarterlies and at tax time and the university's during enrolment/scheduling and exams.) ¹ No, that didn't mean less work, since electrographics didn't tolerate erasures well. You still had to throw away the card and write a new one.