The HP-20S (Erni)

Introduced on the 3rd January 1989, discontinued end of 2000

This calculator is a basic student scientific calculator. It contains a large number of functions and has four build-in programs.

Serial number: 2843A34029	Serial number: ID04104379

Before 1999 the calculator labels were printed in blue/orange (gold), as shown on the left. The later models the labels were printed in purple/green, as shown on the right.

 

Users handbook

The early models of the Pioneer manuals were spiral-bound. The later manuals were glued.

 

HP-20S related links:

• Wikipedia HP20S