Mincer: Program for multiloop calculations in quantum field theory for the Schoonschip system. We present a SCHOONSCHIP program for analytical computation of arbitrary massless, scalar, one-, two- and three-loop Feynman diagrams of the propagator type within dimensional regularization. The program calculates Laurent expansions of diagrams with respect to the parameter of dimensional regularization up to terms which, in particular, are sufficient to perform four-loop renormalization group calculations within the minimal subtraction scheme in four-dimensional quantum field models.