I recently discovered a treasured artifact from my earliest days learning computer programming, an IBM System/360 Reference Data card, known as a "Green Card." This card dates back to about 1968, although I probably acquired it around 1970.
I scanned the card and I'm making it available for download as a PDF (11Mb). It is rather large, both in file size and in dimensions, it would print at full size at over 25 inches wide, although it folded into a nice 14 page format. You could easily tell who was an IBM/360 assembly language programmer because they always had a Green Card tucked in their shirt pocket, right behind their pocket protector.
I scanned the card and I'm making it available for download as a PDF (11Mb). It is rather large, both in file size and in dimensions, it would print at full size at over 25 inches wide, although it folded into a nice 14 page format. You could easily tell who was an IBM/360 assembly language programmer because they always had a Green Card tucked in their shirt pocket, right behind their pocket protector.
