• Large, twelve-character display.
• 10 data registers and 99 program lines.
• Probability, trigonometric, and hyperbolic functions.
• Keystroke programming.
• Six built-in programs.

Product Description ------------------- A comprehensive scientific calculator, the Hewlett-Packard HP20S features easy-to-use algebraic entry and a built-in program library of over 100 scientific and mathematic functions. The library has frequently used functions like root finder, Simpson's rule of integration, complex number operations, 3x3 matrix operations, quadratic formula, and curve-fitting programs--all at the touch of a key. The HP20S also has essential trigonometry and math functions such as sine, cosine, tangent, exponential, and natural log and antilog functions. .com ---- A comprehensive scientific calculator, the Hewlett-Packard HP20S features easy-to-use algebraic entry and a built-in program library of over 100 scientific and mathematic functions. The library has frequently used functions like root finder, Simpson's rule of integration, complex number operations, 3x3 matrix operations, quadratic formula, and curve-fitting programs--all at the touch of a key. The HP20S also has essential trigonometry and math functions such as sine, cosine, tangent, exponential, and natural log and antilog functions. With this calculator, you can also perform English/metric conversions and fast conversions for mass, distance, volume, and temperature. And with the algebraic entry system, you can enter algebraic notations just as you would write them down on paper (a terrific time saver). For calculations you do routinely, the HP20S can record your keystrokes for future use--a great feature when you are working on a long-term project or set of calculations that you'll need to access repeatedly. This is an ideal tool for students or professionals in the sciences and mathematics, and with its small size, the HP20S conveniently slips into a backpack or briefcase for easy transport. --Dana Van Nest