3 ms·

One thing I'm wondering -- were the punch cards numbered/identifiable, at least? haha

• m463 7y ago
  you could make an angled line with a sharpie down the side of the deck.
  • Causality1 7y ago
    That's a very handy trick I'll have to remember.
• shakna 7y ago
  Several Australian universities at the time had punch card sorters. They were extremely loud and took an extremely long time, and I'm not quite sure what they used to mark the placement of the cards, but they mostly worked.
• thesmok 7y ago
  In USSR they were numbered: two digit serial number was printed on blank cards. I'm not that old, but used punch cards were used for note taking in my local library in 90's.
• cpr 7y ago
  Some languages (I think Cobol) allowed the last 8 columns of punched cards to contain sequence numbers for physical sorting...