Data General DTOS 8.1 on cassette.
Here is a blast from the past – anyone remember loading DTOS from cassette tape?
This is way before my time but I suspect this was the next stage on from Paper Tape before 9 Track Mag Tape became prevalent.
VIP John (USA) has very kindly entrusted me with these DTOS tapes from his Field Engineering days.
Nope, never on cassette. Only on giant reel tape using a DG vacuum drive . . . woe to he who opened the drive door when the tape was being read.