Scientific/Engineering expression calculator. Features 6 tools including an Units Converter, a Formula Solver, Tabulator, Statistical Data Analyser, Chem Assistant and an On The Spot calculator. Solves expressions exactly as written on paper. Comes with more than 165 builtin functions for engineering, financial, statistical, polynomial and other common mathematical operations. Includes a full set of operators for basic, comparison, bitwise operations and more. Custom functions can be built. Supports plugins. Number bases from 2 - 36 supported. Results can be viewed in 10 different formats. Supports fractions and sexagesimal numbers. Syntax coloring for expressions. Calculated expressions can be saved in a log for future reference. The database of the units converter has 711 units in 35 categories and can be fully customised. Useful for both students and professionals.