[cctalk] Re: Friden edge punched cards

I think edge-punched cards were primarily used for transaction and account data storage with electronic accounting machines during the period when small and medium size organizations were transitioning from completely manual accounting and record-keeping systems to computerized ones. They were essentially a variation on things like mag-stripe ledger cards used with the Burroughs Sensitronic and E-series accounting machines. I remember seeing the edge-punch card equipment attached to a Burroughs TC-series machine in the early 1970s.