Royal 90S (UA121)
The Royal 90S is an arithmetic calculator with 8 digits precision and algebraic logic. It has 8 functions, 22 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAAA batteries.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 8 |
| Keys | 22 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | VFD |
| Length | 120mm |
| Width | 74mm |
| Thickness | 21mm |
| Power Source | 4xAAA batteries |
| Year introduced | 1976 |
| Year discontinued | 1976 |
Replacements:
If you have a Royal 90S that is no longer working, you can first try replacing the 4xAAA 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: