"The main window allows you to add the document you want to work on and it displayes the basic operations."

"The Statistics tab helps you select what kind of operations you want to perform."

"The Charts tab allows you to choose what kind of structure your chart will have."

"The Settings window helps you customize the utility so it will remeber up to 13 or more files."

"The Other tab enables you to select the automatic calculation and the precision of decimal separators."