A calculator always at hand, UltimaCalc is compact and can stay always on top. Type in your expressions, fix any errors, save calculations to a file. Evaluate algebraic expressions, with functions and constants you define yourself. Find definite integrals. Use a hundred million prime numbers. Create charts; Regression (4 methods); Standard Deviation; Plot functions; Solve Triangles; Simultaneous Linear Equations; Polynomial Roots; much more.