UCALC (16-bit) is a multi-purpose calculator with an expression evaluator, unit converter, user solution modules, financial calculations, equation solver, general ledger, graphing, and more. The Expression Evaluator supports many built-in functions, operators, numeric bases, numeric formats, and modes. It evaluates expressions such as "5+4*10-13". The Unit Converter lets you convert between units of measure in a flexible manner. It includes many categories, and allows you to add even more. The User Solution Modules let you interactively define and solve problems by simply filling in the blanks without directlyahaving to manipulate math formulas. The Summation Tables can be used for practical things such as calculating annuity, compound growth, etc. The Equation Solver lets you solve for the unknown value in an algebraic expression. The General Ledger is not just for heavy duty scientific calculations. This simple general ledger is ideal for adding up many numbers. You can also graph cartesian, polar, parametric, 3D equations, or coordinates from data files. Your work can be saved or pasted to the Clipboard.