Hewlett-Packard HP 22 (Woodstock TURNIP)
The Hewlett-Packard HP 22 is a scientific calculator with 12 digits precision and RPN (reverse polish notation) logic. It has 39 functions, 30 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is 2xAA NiCd battery pack.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Scientific |
| Functions | 39 |
| Keys | 30 |
| Precision | 12 |
| Logic | RPN |
| Display type | LED |
| Length | 129mm |
| Width | 67mm |
| Thickness | 29mm |
| Weight | 170g |
| Power Source | 2xAA NiCd battery pack |
| Year introduced | 1975 |
| Year discontinued | 1978 |
Replacements:
If you have a Hewlett-Packard HP 22 that is no longer working, you can first try replacing the 2xAA NiCd battery pack batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.
We suggest the following current model as a replacement: