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
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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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