Texas Instruments TI-30XIIS Solar Scientific Calculator: * 2 display lines, displaying 11 characters * LCD display * Trigonometric functions in degrees and radians * Fraction/decimal conversions * Common natural logarithms * Reciprocals * Factorials Universal Powers and Roots * Polar/rectangular conversions * 2-variable statistics: enter, delete, insert, edit * Hyperbolic * Power Source: Solar and battery