Unlike traditional calculators this easy to use software calculator displays all input data ,making it easy to double check on data entered ,data can also be randomly altered without having to re-input the entire calculation . It also has full data saving , back-up and protection features, is capable of doing long and multiple calculations and has Vat capabilities.Has many other features not available in traditional calculators including text input, data print-out, function key assignment, template download and file transferring abilities.Will generate up to 25 pages or approx 5000 entries.A very handy little calculator to have on your desktop.