herman hollerith
Punched cards and electrical pulses quickly gave way to vacuum tubes and electronic digital computers.
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Herman Hollerith
It is the medium by which people communicate with computers in the olden days. Computer programs are written in punched cards, input data are also written in punched cards. There was a special machine called "card reader" to interpret what were in the punched cards and convert them into machine readable form.
A punch card are cards with punched holes in them that represent data. You feed them into a (usually) large-scale computer that can accept them.
Punched cards & magnetic tape
Hollerith
it is a computer program in punched cards
Henry Hollerith and the punched cards
Because the computer can't read my thoughts and I need some way to tell it what I want it to do. When I first started using computers you used punched cards to do that and the keypunch that punched the cards had a keyboard but was not connected to the computer. You punched the deck using the keyboard on the keypunch, then took the deck to the computer's card reader.
Photocopied spreadsheets and forms, and Engineering drawings on aperture cards (microfilm on punched cards)