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The best Scientific&Engineering RPN calculator. Support for Complex numbers, Matrices, Statistical calculations, Trignometry, Integration, Solving equations&Basic arithmetic.~ Looks as good as the HP-15c~ Performs as good as the HP-15cand more ..A set of scientific&engineering functions, support for complex numbers, matrices&basic arithmetic.Esoteric features include transcendental functions&matrix operations..FeaturesRPN Mode Calculator.Programmable. KeyStroke programming- 499 Steps.Hundreds of built-in functions.Full Screen&Quick Stack Display.Basic Mathematical calculations.Advanced Mathematical calculations.Complex number calculations.Matrix operations.Trigonometric functions.Hyperbolic Trigonometry.Combinations and Permutations.Polar Rectangular conversions.Time conversions.Angle conversions.Solver / Root finder.Definite Integrationand more ....and more ….