HP 20S Scientific Calculator

Large, twelve-character display 10 data registers and 99 program lines Probability, trigonometric, and hyperbolic functions Keystroke programming Six

HP 20S Scientific Calculator : Office Products

HP Scientific Calculators

Vintage Hewlett Packard Model HP 20S Scientific Programmable Calculator with a Built-In Library, Made in Singapore, Original Cost 39.95 USD, Circa 1995

The Pioneer Series

Complete with original box, sealed manual, case and new batteries. --Dana Van Nest. Large, twelve-character display.

Hewlett Packard HP 20S Scientific Calculator Complete With Box, Sealed Manual

Hewlett Packard HP 20S - SCIENTIFIC CALCULATOR, w/case 20 S [0822180801] - $25.00 : EdsGoodStuff, it's all good

MyCalcDB : Calculator Hewlett-Packard 20S aka Pioneer ERNI

Hewlett Packard Calculator HP 20S Scientific desk 1987 USA Indonesia - Vintage Man Stuff

Hewlett Packard Calculator HP 20S Scientific desk 1987 USA Indonesia - Vintage Man Stuff

HP-20S Scientific Calculator

hp 20S Algebraic Scientific Calculator