Curiosity about HP-65 Standard Pac

[Dieter]

(01-09-2019 10:17 PM)albertofenini Wrote:  sorting out things in our boxes, we have found a Standard Pac for HP-65 that includes a couple
of cards not described in the Standard Pac Manual.
Looking at the attached picture you will notice a STD 1A card, and a STD 14B.
Our Standard Pac manual starts describing STD 1B Day of the Week but it doesn't mention a STD 1A card,
nor it mentions a STD 14B which has the same title of the STD 14A but has different inputs.

First of all: cave – I have never owned an HP65.

You may take a look this thread (in the old HPmuseum forum). The letters A or B seem to indicate different revisions of the same program, maybe bugfixes.

Please also take a look at the last message in the linked thread. According to that post HP indeed changed the first program of the HP65 Standard Pac. Looking at your picture you seem to own both versions of the first program: the calendar program as well as the investment program.

On the other hand the letter A or B usually seems to refer to different versions of the (basically) same program. This seems to be the case for your SD14 program: you got both the original program and the revised version of the solver program.

Dieter