Hewlett Packard HP-20S

Serial Number 3439S85380: 1994, 39th week, Singapore
Accessories Pouch

Manual: Scientific Calculator Benutzerhandbuch HP-20S, (German), dated Nov 1999 , still sealed

Original cardboard box
Condition Mint out of the box!
Acquired 18.9.2002
HP codename, series Erni, Pioneer
Type, Precision, Input Mode Scientific, 12 BCD digits, exponent 499, Algebraic
Programmable Yes, keystrokes, symbolic labels 0-9, A-Z.
Performance Index 23
Memory 10 data registers, 99 program steps, permanent memory
Display 12 digit 7-segment LCD plus sign
Special features Root finder, numerical integration, complex numbers, 3x3 matrices, quadratic equations, curve fitting.
Original Pricing, Production 3.1.1989 ($49.95) - now (2002, approx. 40€)
Batteries 3x small button sized cells
Dimensions Length 14.7cm, Width 7.8cm, Height 1.5cm
Links Scientific Calculator Owner's Manual HP-20S (PDF, English, 133 pages, edition 6, November 1994, printed in Singapore, 11/94)
Scientific Calculator Benutzerhandbuch HP-20S (PDF, German, 137 pages, 1. Ausgabe, Mai 1988, printed in Germany 11/92)
Comment The HP-20S is apparently very similar to the HP-21S but offers a more general set of features (ie. hex, oct, bin number bases) whereas the HP-21S is specifically geared towards statistics applications.
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