Supports a rich expression format, which is in most cases identical to what you would type in your programming language.

Support for adding unlimited numbers of variables.

Built-in debugger that lets you see the expression simplified step by step.

Debugger Back-step lets you backup as many steps as you like so that you can replay critical operations.

C/C++ operator precedence

Mouse optional, all calculator commands and functions can be done using the keyboard alone.

Mini-Calc Mode lets your calculator take up very little screen real estate, and yet remain entirely usable.

Numerous built-in unit conversions (memory sizes, lengths, areas, volumes, temperatures etc.)

Built-in great circle route and straight line distance calculators.