HP-65 Standard Pac versions

[rprosperi]

(Note: Please correct the title to reflect HP-65)

The olive drab case is the older of the two, used in initial HP-65 production and eventually changed over to the clear style, though I've information when the change took place.

The cards were updated (A -> B) when bugs were found and fixed, on a running basis, and only the changed cards got new revision letters (so a set might have all "A" cards except maybe one or two "B" cards.

As for the exact changes, I've never seen any comparison that captures all the differences. Of course if your 65 card reader works, you can read them, step through the program and write the steps.

The manual at hpcalc.org (https://literature.hpcalc.org/items/973) from June '74 shows these as "A" programs, but I'm not sure they bothered to revise the manuals each time a card was revised.

Not all you're looking for, but that helps a little....