New as of 12-9-2012: Web storage has been added so you can come back if the power goes off or if you leave or close your page your calculations will still be there.
The scientific calculator with spreadsheet you can solve most complex mathematical problems without pencil and paper.You have all your calculations in view and if you see a mistake you can edit it. You can print and save in xps format than you can email or access on your computer. If has a visible memory which you can store any number on the form or calculator display window and retrieve later.It has a full right angle trig calculator accesable with a calculator button. This calculator will save you time and promote accuracy