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HP-97 Programmable Printing Calculator
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Keycodes representing keys on the left keyboard of the HP-97 have keycodes with no sign before them,
so a  RCL 3 instruction loaded into the HP-97 would have a keycode of 36 03. If that operation were recorded
onto a magnetic card, and then loaded from the card into an HP-67, the keycode for the operation in the HP-67
would be 34 03.
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Although the keycodes are altered, the operations are the same from calculator to calculator, from HP-67
to HP-97. And since each operation, no matter how many keystrokes it takes to perform, is loaded into a
single step of program memory, the steps of program memory into which a program is loaded are the same
when a program is changed from one calculator to another.
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