Ucalc is a high precision scientific calculator which can evaluate expressions, solve equations, perform numerical integrations, and do summations. It supports many built-in functions, operators, numerical notations, and modes. It also allows for user-defined functions and variables. Graphs in cartesian and polar coordinates and will graph parametric curves and data files. There are two ways of running the Ultimate Calculator: either at the DOS command line as UCALC 5+4*8/2 [enter] or in an interactive environment. Shareware.