Opening Splash Screen - Shows for 1.5 seconds. In the site licensed version, your logo can appear on this screen and the about screen.
Main Screen - Enter input values here, select categories, input and output unites. Results are displayed at the bottom
Categories Selection - Scrolling lists of the various categories available in the system.
Input and Output units selection - Different depending on the categories, up to 20 selections depending o the category, this one is for the Flow Category.
About Screen - This one is for the Demo version, Commercial version is similar without the request to buy. This screen comes up in the Demo version every time you change categories or units.
Edit and Help Menus - These menu items offer copy, paste, input/output swapping and various help functions.