JWG (jwg) wrote,
JWG
jwg

Card deckery in the '60s

Back in the bad old days the only method of inputting anything new into a computer was via punched cards. The IBM 026 Key Punch machine was the way to do it. They rented for $50 a month (this was before the IBM antitrust suit whose result was that IBM had to sell as well as rent equipment). The machine was actually slightly programmable - there was a drum with a specially prepared punched card on it that could specify things such as that certain columns had numbers only or have the equivalent of tabs. Most programming languages had column specific meanings such as column 7 being the start of an actual statement in Fortran and columns 72-80 were for sequence numbers.

Tired of waiting in line to make corrections to my card decks I tried to convince management to get another key punch for programmers to use. My economic argument about the $50/month rental of a key punch machine vs the $600-$1200 a month salary of a programmer which showed that if there was at least one person waiting line for a spare machine to make corrections for as little as a cumulative 45 minutes a day it was worth getting another machine for programmer corrections still wasn't good enough because of various bureaucratic reasons; eventually they gave in and for a while our project got a temp worker and a key punch machine.

The Key punch machine printed on the top of the card what was punched so they could be read. Woe to the person who dropped a deck of cards that didn't have sequence numbers. Card decks could be sorted on a sorting machine and printed on an IBM 407 Accounting Machine. The Accounting machine was programmable by plugging in wires on the control panel board and was used in businesses for considerably more complex operations than printing a deck of cards. It could print at 150 cards a minute; for assembly language programs which could be a whole tray of cards this was slow.
Tags: career
Subscribe

  • Baseball

    When I was a kid I was a Yankees fan - I lived in NYC. My father was a NY Giants fan. We occasionally listened to games on the radio and I went with…

  • ROTC - 1957

    Yesterday was National Armed Forces Day. The closest I ever came to being a member of the Armed Forces was freshman year at MIT where taking ROTC…

  • Operas we've watched since January 9

    Since January 9th we have watched 31 MetOpera streams. Coupled with 52 earlier in the series we've watched 82. One of the few good features of the…

  • Post a new comment

    Error

    Anonymous comments are disabled in this journal

    default userpic

    Your reply will be screened

    Your IP address will be recorded 

  • 9 comments