National Semiconductor 4525 (Scientist PR)
The National Semiconductor 4525 is a programmable calculator with 8 digits precision and RPN (reverse polish notation) logic. It has 20 functions, 39 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is 3xAAA sealed. Note: Novus 4525 Scientist PR
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Programmable |
| Functions | 20 |
| Keys | 39 |
| Precision | 8 |
| Logic | RPN |
| Display type | LED |
| Length | 150mm |
| Width | 75mm |
| Thickness | 31mm |
| Power Source | 3xAAA sealed |
| Year introduced | 1975 |
Replacements:
If you have a National Semiconductor 4525 that is no longer working, you can first try replacing the 3xAAA sealed. 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: