What is "punchcards"

Usage examples of "punchcards".

I turn each millionth of a second of an imaginary Trinity into a deck of punchcards so that we can estimate what will happen in the real Trinity.

On the punchcards are not only the fireball, the shock wave, the radiation, but also an imaginary city.

There are times when I feel as if I am one of those numbers in one of the columns on one of the punchcards flying through the machine.

Every incoherent utterance, every random syllable, was analyzed, compared, reassembled in the form of visual symbols, transcribed on conventional punchcards, and ejected into various coded slots.

He rummaged around in it for a time, then returned holding a sheaf of punchcards like a poker hand.