hp 20s scientific calculator

The HP 20S scientific calculator comes with a built-in library.

• frequently used functions at the touch of a key with the powerful built-in program library
• perfect for finding a root, using curve-fitting programs, calculating Simpson’s Rule of integration, complex number operations, 3x3 matrix operations and quadratic formulas
• great for sine, cosine, tangent, exponential, natural log and antilog functions
• quickly calculates conversions for mass, distance, volume and temperature
• labeling lets you see data values, as in amortization, at a glance
• 1-line x 12-character LCD for easy viewing
• 10 memory-storage registers

Specifications:

• Battery Type - 3 x LR44 
• Display - 1 line x 12 char. LCD 
• Entry system logic - Algebraic 
• Built-in functions - Over 150 
• Customization Method - Keystroke 
• Statistical analysis - Cumulative 
• Polar/ rectangular and angle conversions
• Base conversions and arithmetic
• Linear regression, combinations, permutations
• SUM x, SUM x 2, SUM y, SUM y 2, SUM xy
• Decimal hrs/hrs.min.sec. conversions
• Trig., Hyperbolics
• Unit conversions