Enterprex R-90
The Enterprex R-90 is an arithmetic calculator with algebraic logic. It has 5 functions, and an LED (light-emitting diode) display typical of calculators of this era. The power source is 2xAA batteries.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 5 |
| Logic | Algebraic |
| Display type | LED |
| Length | 121mm |
| Width | 76mm |
| Power Source | 2xAA batteries |
| Year introduced | 1975 |
Replacements:
If you have an Enterprex R-90 that is no longer working, you can first try replacing the 2xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.
We suggest the following current models as possible replacements: