HP -67 Manual page 11

Slide the W/PRGM-RUN switch to
!
Now Press:
F, CL PRGM (CLx key)
to clear the calculator.
Press the following keys in order. (When you are loading a
program, the display gives you information that you will find
useful later, but which you can ignore for now.)
F, LBL (SST), A
Defines the beginning of the program and labels it "A".
Now for the keys you pressed to solve the problem manually:
X
2 (blue-shift 9 key)
π
(black-shift 2 key)
×
Now end the program with RTN (return):
H, RTN (GTO key)
The calculator will now remember this keystroke sequence
when you press "A" while the calculator W/PRGM switch is
in the RUN position.
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