Punched card - 1967 7 of 29
Programs were punched on a deck of cards.
If you dropped the cards, the sequence was lost; so the cards were often serially numbered.
Carrying a large deck from Austria to Germany in 1967, duty was charged on the blank cards, but not on the punched ones. The customs man carefully counted the number of blank ones!
1967-PunchedCard-1329.JPG
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