APF MARK 90
The APF MARK 90 is a programmable calculator with 8 digits precision and algebraic logic. It has 45 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 3xSealed.
Facts at a glance:
If you have an APF MARK 90 that is no longer working, you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement: