Definitions of green card  [ˈgrinˌbʌg]  

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.

In fall 2000 it was reported from Electronic Data Systems that the green card for 370 machines has been a blue-green booklet since 1989.