green card
n. [after the `IBM System/360 Reference Data'
card] This is used for any summary of an assembly language, even if
the color is not green. Less frequently used now because of the
decrease in the use of assembly language. "I'll go get my green
card so I can check the addressing mode for that instruction."
Some green cards are actually booklets.
The original green card became a yellow card when the System/370
was introduced, and later a yellow booklet. An anecdote from IBM
refers to a scene that took place in a programmers' terminal room
at Yorktown in 1978. A luser overheard one of the programmers ask
another "Do you have a green card?" The other grunted and
passed the first a thick yellow booklet. At this point the luser
turned a delicate shade of olive and rapidly left the room, never
to return. See also
card.