Hewlett-Packard HP 21 (Woodstock PUMPKIN)
The Hewlett-Packard HP 21 is a scientific calculator with 12 digits precision and algebraic logic. It has 25 functions, 30 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is Sealed NiCd battery pack. A sample of this calculator is held in the calculator.org collection.
Facts at a glance:
|Power Source||Sealed NiCd battery pack|
If you have a Hewlett-Packard HP 21 that is no longer working, you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement: