Royal 90K (UA120)
The Royal 90K is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 19 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAAA batteries. The calculator was manufactured in Japan.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 5 |
| Keys | 19 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | VFD |
| Length | 114mm |
| Width | 70mm |
| Power Source | 4xAAA batteries |
| Country | Japan |
| Year introduced | 1975 |
Replacements:
If you have a Royal 90K 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: