Display uses scientific notation, 10 digits mantissa, 2 digits exponent, red LED.
Distinctive features: The first hand-held calculator with business and finance functions.
Has functions for business and finance calculations, such as compound interest.
3.6v (3x AA rechargeable cells in a battery pack).
80 x 149 x 36 mm (3.2" x 5.9" x 1.4").
Launched in February 1973.
Made in USA.
Price on introduction US$395.
This was the first hand-held business & finance calculator and was the second Hewlett-Packard hand-held calculator.
Like the early HP-35 models, the early HP-80 models do not have the model number on the front label.
The early HP hand-held calculators were very expensive. Tough plastic cases were available to protect them.
There is an enormous amount of information about the HP-80 gathered by David Hicks at the Museum of HP Calculators at http://www.hpmuseum.org/hp80.htm.
© Text & photographs copyright Nigel Tout 2000-2019 except where noted otherwise.