Gaming Computers- High processing speed and designed to be used for gaming.
Handheld Computers- The things that are being used by Billions of people. Firstly designed as an Internet Browser, now can be used in gaming and office purposes
Mainframe Computers- The large boxes (computers) that you see in server rooms. Designed to be used on processing large quantities of data on the same time.
Office Computers- The things you see in your office. Cheap computers that is undercut in processing speed, and designed to run Office applications.
that'sall I know. have a good day :)