Qualitron 4040
The Qualitron 4040 is an arithmetic calculator with algebraic logic. It has one of the early LCD (liquid crystal) displays which incorporated a yellow filter.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Logic | Algebraic |
| Display type | YLCD |
| Year introduced | 1978 |
Replacements:
If you have a Qualitron 4040 that is no longer working, you can consider replacing the calculator with a modern equivalent.
We suggest the following current models as possible replacements: