Brother 508SR (PROCAL 508SR)
The Brother 508SR is a scientific calculator with algebraic logic. It has 20 functions, 26 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAA batteries.
Facts at a glance:
| Feature | Value | 
|---|---|
| Type | Scientific | 
| Functions | 20 | 
| Keys | 26 | 
| Logic | Algebraic | 
| Display type | VFD | 
| Power Source | 2xAA batteries | 
| Year introduced | 1976 | 
Replacements:
If you have a Brother 508SR 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 model as a replacement: