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HP 20s Calculator - Product Specifications

This document describes the specifications for the HP 20s calculator.
Physical features
Feature
Specification
Display
1 line x 12 char. LCD
Entry system logic
Algebraic
Menus, prompts, alpha messages, softkeys
Not available
RAM / no of variables or registers
99 steps, 10 reg
Built-in functions
Over 150
Re-definable keyboard and menu keys
Not available
Math and statistical features
Feature
Specification
+, -, x, /, sq. root, 1/x, +/-, 1nx, ex, n!, yx, logx, 10x, x2, %, pi
Included
Fractions
Not available
Trig., Hyperbolics, HP Solve (root finder)
Trig., Hyper only
Numeric integration / Complex number functions
Not available
Statistical analysis
Cumulative
SUM x, SUM x2, SUM y, SUM y2, SUM xy
Included
Sample standard deviation / mean / weighted mean
Included
Linear regression, combinations, permutations
Included
Curve fit (LIN ,LOG, EXP, POW)
Not included
Normal, X, t, F distribution
Not available
Scientific features
Feature
Specification
Decimal hrs / hrs.min.sec. conversions
Included
Polar / rectangular and angle conversions
Included
Base conversions and arithmetic
Included
Unit conversions
Included
Bit, Boolean operations
Not available
Customizing features
Feature
Specification
Method
Keystroke
No. of steps / formulas or programs / formulas
99/16
Batteries and warranty
Feature
Specification
Batteries
3 x LR44
Warranty
One-year warranty

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