HP -65 Owner's Handbook Manual page 18

Recording the Function
To record the program
1. Select an unprotected (unclipped) magnetic card.
C
unprotected protected
2. Switch to W/PRGM. (A reminder: W/PRGM stands for
Write.)
3. Pass the card through the right lower slot exactly as in
loading a program (above). Providing the card is unpro-
tected, it now contains your program.
In the above example, we left keys [ . . . [@ undefined.
We could have keyed in definitions for them, also.
We have just shown how you can write a program for a simple
function and identify it with one of the five user-definable keys.
Your HP-65 can also be programmed without any reference to
the top keys. You will see an example of this when you turn again
to the subject of programming later in this handbook. It is easy
to create simple functions. With very little additional effort, you
can create functions or other programs of considerable com-
plexity.
Onward
We hope that you have enjoyed your introduction to the HP-65
Pocket Calculator. The rest of the handbook presents the aspects
of the calculator not covered thus far. In regard to the reference
information (enclosed in blocks, to distinguish it from the narra-
tive), it is probably sufficient to study this material casually on
first reading, postponing a more thorough reading until comple-
tion of the entire book. You can quickly become familiar with
the keyboard and gain assurance by merely keying in the nu-
merous sample cases and making sure that you understand each
of them.