Hewlett-Packard HP-65
Display uses scientific notation, 10 digits mantissa, 2 digits exponent, red LED.
Scientific, programmable, with 100 program steps.
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 January 1974.
Made in USA.
Price US$795.
This was the first hand-held programmable calculator. Programs can be stored on magnetic cards, see photographs below, though these had been used previously with desktop programmable calculators. Program libraries for performing calculations for various disciplines could be purchased from HP.
