The Museum of HP Calculators

This Hewlett-Packard advertisement, originally published in Scientific American, is used by permission. If errors crept in during the scanning process, please contact Dave Hicks

Another pocket-sized scientific achievement: The HP-21. $125*

We designed it for what we believe to be a growing class of calculator-oriented people who appreciate the very high quality that we put into HP pocket calculators but who don't require all the features and functions of our HP-45, 55, and 65.

The HP-21 is more compact than our other pocket-sized calculators. Closer to palm size. The minute you've grasped its keyboard's elegant simplicity, you'll see that it has considerably more capability than our pace-setting HP-35, presented in an easily comprehensible way.

In addition, the HP-21 gives you

In keeping the price down, we haven't skimped traditional HP quality details, some of which you can see and feel, many of which are hidden.

You will find the HP-21 at leading department stores and college book stores throughout the United States, along with our other hand-held models for science and business. For the name of your nearest dealer, write to Hewlett-Packard, call toll-free, (800) 538-7922 (in California it's (800) 662-9862).

*Domestic USA prices only.

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