English and Polish language. Calculator solves math expressions like: Sin(Pi)-Root(-8;3) e.g. User can create own functions (e.g. surfaces, volumes, and so on) and publish in Internet. Other users will download those functions and use. Program shows position of bugs in math expression made by user. Descriptions of bugs help solve a problem. Automatic Prompter shows all available functions, variables, constants. Simply press SPACE key. Exchange rates table and currency converter are update from Internet by one click. There are average exchange rates announced by National Bank of Poland. Units converter makes easier to convert various units. 14 categories of units: length, temperature, pressure and so on. User can define a lot of variables. Numeral systems: binary, octal, decimal, hexadecimal. Measures of angle: radian, degree, gradus. Keyboard of calulator can be configured. Often used functions can be under a button now. Help available by F1 press or click over selected button.