Running Programs - HP -67 Manual

Register Storage
In addition to the automatic storage used during calculations,
there are registers you can store your numbers to and recall
them for later use. These registers are: 0 to 9 and A to E.
To store the displayed number in a register, press the STO
key followed by the register name. To recall a number in a
register, press the RCL key followed by the register name.
You can swap all 0-9 registers between the P (primary) and S
(secondary) banks (the STO/RCL functions only work on the
registers in the P-bank.) Use the ! function under the
(F, CHS) key to swap banks. You can keep up to 20 numbers
stored this way - 10 in each bank. (See Charts below).

Running Programs

Use the "Load Card" button to open a program book. The
book graphic emulates the way the original magnetic cards
looked when stored.
Select the program you want, then press "Open." An
animation will play of the card loading and the sound of the
"card motor". This is the actual sound recorded from a real
HP-67. When the card is done loading, it will be displayed in
the card holder area above the A-E keys. Note function key
notes can be stored with a program, allowing you to