On Tue, Nov 4, 2025 at 10:23 PM Paul Koning via cctalk <[email protected]> wrote: > > I was just looking at some Friden Flexowriter documentation, specifically the > later 2300 series. They look somewhat more modern than the well known > Flexowriters but seem to be comparable otherwise. I remember seeing a mix in > the TU Eindhoven computer center, around 1970. > > The documentation mentions an optional feature, the ability to read and punch > "edge punched cards". Those look like conventional Hollerith cards, but > instead of the 12 row punching with rectangular holes, they are punched along > the bottom edge in exactly the same manner as an 8 channel punched tape. In > other words, imagine running a blank card through the tape path of a paper > tape punch, and that's what you would see. > > I never ran into this before. Has anyone ever seen these in the wild? >
Not using a Flexowriter, but the original membership cards for the now-defunct 'Cambridge University Computer Preservation Society' in the UK were approximately credit-card sized and were edge-punched with membership details. See here : https://cucps.soc.srcf.net/membcard.htm -tony
