Compute! - Version 3.1 An enhanced calculator that includes a printer tape display, built in fraction calculator (will even display answers in fraction format), square root and exponent functions (including an unlimited exponent), auto average function - simply add some numbers and Compute! will automatically give an average, common memory functions, four window modes (normal, advanced, small, and ultra small), 20 "quick" measurement conversions, 4 customizable conversions - enter in any conversion you wish and Compute! will remember it, multiple formats on the printer display (including currency and scientific), copy-o-matic feature - will automatically copy the last equation result into the windows clipboard, authentic adding machine sounds, and it will save and load tape print outs.