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Getting Started
39
A Word about the HP-67
Now that you've learned how to use the calculator, you can begin to
fully appreciate the benefits of the Hewlett-Packard logic system.
With this system, you enter numbers using a parenthesis-free,
unambiguous method called RPN (Reverse Polish Notation).
= You never have to work with more than one function at a time.
The HP-67 cuts problems down to size instead of making them
more complex.
= Pressing a function key immediately executes the function. You
work naturally through complicated problems, with fewer key-
strokes and less time spent.
= Intermediate results appear as they are calculated. There are no
'"'hidden'' calculations, and you can check each step as you go.
= Intermediate results are automatically handled. You don't have
to write down long intermediate answers when you work a
problem.
= Intermediate answers are automatically inserted into the prob-
lem on a last-in, first-out basis. You don't have to remember
where they are and then summon them.
= You can calculate in the same order that you do with pencil
and paper. You don't have to think the problem through ahead
of time.
The HP system takes a few minutes to learn. But you'll be amply
rewarded by the ease with which the HP-67 solves the longest most
complex equations. With HP, the investment of a few moments of
learning yields a lifetime of mathematical dividends.
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