ExS - Version 0.5.1 ExS is a simple, yet powerful scientific calculator. It supports the standard math and advanced functions like sin, cos, tan, absolute value, logarithms, percentages, currency, integer division, hexadecimals, set variables, you can even determine what time it will be or was based on the math you specify along with the "time" and "date" function! ExS keeps track of all calculations in the scrollable display and you can even export to .rtf (Rich Text Format) for later viewing and printing. This is a complete Windows Calculator replacement.