You can make conversions in 31 measurement categories(450 unit),convert radio frequency into wavelength and vice-versa, calculate the decibel rating based on power or voltage,also convert numbers into Roman numerals and other bases such as hexadecimal,generator prime numbers,calculator mathematical formulas(5 dependent variables),refernce geometric formulas,viewer system's fonts,a table lists size conversions for common clothing sizes in British, American, and Continental units,the program can draw graph mathematical formulas,the program have reference tablesThe program can lay in tray and does not   impede you to work with other programs.You can use hot key to call searching of measure, calculator , notepad ,and measure window.