Saving Data; Creating Your Own Programs - HP -67 Manual

Saving Data

Press "Save Data" to save data from your storage registers
0-9 (Both S and P banks), A-E, and I. They can be copied to a
"Data Card." There are two types. Both can be used to save
and restore data. The "Data Card" type simply stores the
registers. The "Chart Card" stores the data but allows you to
specify a chart type to display when the card is loaded and
"Open" is run.

Creating Your Own Programs!

Creating programs is, at the most basic, simply storing the
key strokes you would use to complete a calculation and
assigning the keystrokes to a function key for later execution.
There are also advanced commands that let you loop and
branch according to conditions, pause to display output, etc.
However, to start with, you can create simple programs to
automate keystrokes and work your way up to more complex
programs. Programming can be fun! (and addictive), so be
warned.
There is much more on programming the HP-67 on a few
websites. Links will be provided in the Appendices.
Let's create a simple program to get your started.
Key Codes