We found an old 80-column punched card - a relic from the time my wife
was a programmer on IBM 360 mainframes.
The data on this card is object code from an assembler, apparently.
That's a 1GB memory stick for comparison.
There's a more recently posted alternative picture here, along with a
rant about data security:
and I have a shot of the punched card on its own if anyone needs one.