On Dec 1, 2019, at 20:09, John Levine <johnl@xxxxxxxxx> wrote: > > I thought it was 72 characters because that's how many you got on a > punch card, leaving 8 for the sequence number. More likely, it’s 72 characters for the line width of a Model 33 Teletype (a.k.a. ASR-33/KSR-33). Not everyone had a line printer or a card reader! Grüße, Carsten
