HP HP-67

Interchangeable Software 305
loaded and run on the HP-97 with its built-in printer. On the HP-97
prints a blank space on the paper tape, just as if you had
pressed the paper advance pushbutton, and it is extremely useful
in separating answers or portions of your HP-97 print-out.
Remember: Any program or data recorded on a magnetic card can be
loaded from that card and used in either the Hewlett-Packard HP-67
Programmable Pocket Calculator or the HP-97 Programmable
Printing Calculator. Because the design of these two calculators has
been integrated, you can use your own program cards, or preprogram-
med cards like those in your Standard Pac or any of the optional appli-
cation pacs, in any HP-67 or HP-97.
A Word about Programming
You have now been exposed to the features of the HP-67 Programma-
ble Pocket Calculator. But exposure is not enough—to gain confi-
dence in and fully appreciate the power of this small computer, you
must use it to solve your problems, simple and complex. Although the
best program for a given application is usually the most straightfor-
ward, don’t be afraid to experiment, to forge into the unknown, to
stamp upon your programs your own personal trademarks. And you’ll
probably want to learn some of the‘‘tricks’’ of sophisticated prog-
rammers to apply in your own software.
A good place to begin is with the HP-67 Standard Pac. At the end of
the text you will find detailed explanations for some of the techniques
used in actual programs in the Pac. You can also learn a great deal
about programming by ‘‘reading’’ the programs in the Pac—
following them, step-by-step, to see what makes them tick, to attempt
to find out why the programmer used the steps he did.
With the HP-67 the problems of the world can be solved!