bhaexpress
New member
I worked at Amex and the Computer Room was kept at a special temperature and only certain personnel were allowed in there. The computer was HUGE and took up the same space as a 5-a-side football pitch.
There were punch cards and punch tape, similar to telex tape with holes in it. The tape was less sophisticated than the cards which replaced them. The cards were rectangular and data holes were punched in them. The verifier would re-punch the data, and the card would lock if the newly-punched data didn't match. Amex replaced punch card machines with machines which put the info onto magnetic tape. These tapes were then taken to the aforementioned computer room. This was a good decade or more before floppy disks.
I worked foe Amex in Westchester House in their computer room on the 4th floor. I remember the IBM 550 interpreter which converted tapes to punch card. Come the 1st January I will start my 39th year in IT.