Well, it has been nearly 30 years since I had to break out my green card... You know, the yellow one?
Mark
Green - S/360, White - S/70 w/o DAT, Yellow - S/370 w/DAT. We still called them green cards...
And the beauty is that a program that ran on the first S/360 made will run on the latest zSeries processor today. Now, finding a card reader may be more of a challenge...