Ag with kids said:
infinity ag said:
Bocephus said:
My father (who passed in 2024) is going to be very upset to find his COBOL skills are no longer required.
My father who passed in 2023 used to program in Fortran in the mid to late 60s at TI. We still have some of his old punchcards at home.
When I first started at LTV in 1992 my computer was in the room that held all the computer cards for both the Near Earth Mission Analysis Routine (NEMAR) and all the input decks for every run they'd ever done. Buttload of filecabinets filled to the brim (the program was probably written before FORTRAN 66).
NEMAR used to take about 2 hrs to run on the VAX when I got there (no more punchcards). When we ported it to a unix system later that year, it ran in 7 seconds. First time, I thought it had failed (did this often because you'd have one digit out of place in the input file and it crapped out).
Shortly before April first in 1979, two math undergraduate students had a wonderful idea. They had noticed that the job numbers on the Amdahl 470 (it might have been the IBM 370 instead) were four digits long.
So they wanted to see what would happen if you issued enough stored procedures to run later to take up all of the job numbers. So they create 10,000 card decks, each with about four or five cards.
They had been planning on duplicating the same job card to be used for each job but I pointed out that it might be easy for the computer operator to just eliminate every job with that job card. So I wrote them a routine to generate 1,000 job cards with each having a different code at the start.
April 1 that year was on a Sunday. I would have gone to the RCC to watch the chaos they created, but there was a car race at Texas World Speedway and so I was out there until pretty late (press box staff). When I got back to town, I heard all about it.
When reading a job on the punch card reader, it would pause while checking to make sure that the credentials were correct. This pause was somewhere around a second, if I remember right. They would stick the cards on the the card reader and it would read a few cards, pause, read a few more cards, pause, ... . It took several minutes just to read one box of cards. They probably got a lot of dirty looks from the other students waiting to submit their card decks.
They managed to read in about 7,500 jobs before everything came to a complete halt. The computer was off line for something like an hour before it came back on with all of their jobs cleared off of it.