MACSYMA for Statisticians introduces the basic principles and ideas of MACSYMA so that it can be used for mathematical computations, manipulations and simplifications. MACSYMA is a large computer programming system which is designed to perform a wide spectrum of mathematical computations and manipulations in symbolic as well as numerical form. It operates interactively and displays results in ordinary mathematical notation. MACSYMA is perhaps most well known for its capabilities in algebraic manipulations and simplifications. However, its usefulness extends much further than that. In the field of analysis, MACSYMA performs differentiation, integration and the taking of limits. It can compute definite integrals, change variables, perform integration by parts, reduce rational polynomials into partial fractions and take Laplace transforms. MACSYMA has several commands relating to Taylor Series and asymptotic expansions.