19. IF line 18 is more than line 15, subtract line 15 from line 18. This is the amount you overpaid

Octothorpe is another name for what common computer keyboard symbol?

How would you categorize the software that runs on mobile devices? break down these apps into at least three basic categories and give an example of each.

Aproject involves many computing systems working together on disjointed task towards a single goal what form of computing would the project be using