Olympia CD 90
The Olympia CD 90 is a scientific calculator with 8 digits precision and algebraic logic. It has 27 functions, 25 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA.
Facts at a glance:
If you have an Olympia CD 90 that is no longer working, you can first try replacing the 4xAA 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: