muMATH/muSIMP

muMATH/muSIMP by Microsoft acts as a very sophisticated calculator that allows the user to perform algebra, trigonometry, calculus, integration, differentiation and transcendental functions. Written in muSIMP, a high level language for symbolic and semi-numerical processing. Special features include exact rational arithmetic (611 digits), algebraic simplification of expressions, exact solution of an algebraic equation, matrix operations on arrays (transpose, multiply, divide, inverse), logarithmic/exponential/trigonometric simplifications and transformations, symbolic differentiation and limits, and symbolic integration of indefinite and definite integrals.\n\nOriginal retail price: $250 (Westico Professional CP/M Software Catalog for ADAM, 1984)