The Unitrex 90SC is a scientific calculator with 8 digits precision and RPN (reverse polish notation) logic. It has 23 functions, 22 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is PP3 9V.
One of the few RPN calculators made by manufacturers other than Hewlett-Packard.
Facts at a glance:
|Power Source:||PP3 9V|