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The HP-80

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Introduced on the 1st of February 1973, discontinued begin 1977.

HP80

The HP-80 was Hewlett Packard's second handheld calculator. This calculator was designed for business rather than scientific/engineering calculations. In addition to having different functions, it was designed with a different philosophy. Whereas the HP-35 was designed for technical/mathematical users, the HP-80 was designed to be a problem solver that didn't require its users to know the formulas needed. So the user could simply enter the known values for his business problem and calculates the answer by a single keystroke.

The ENTER button is relabeled to a SAVE button and this is the first calculator using a shift key.

This early model has a metal trim strip above the power switch. See the small picture below. For later models this metal strip is replaced by a painted trim line.

HP80

 

Manuals

HP80 manual
Quick reference guide
(Dutch)

 

Additional information

A lot of interesting information about this nice business calculator can be found in the next HP patents and article in the HP Journal.

US 3863060 General purpose calculator with capability for performing interdisciplinary business calculations
US 3946218 General purpose calculator with capability for performing yield-to-maturity of a bond calculation.
US 3955074 General purpose calculator having keys with more than one function assigned thereto.
A Pocket Sized Answer Machine for Business and Finance.

See my HP-80 inside page to find out how this Classic model is build.

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HP-80 related links:

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