Do Now:Nov.17,2008

A CPU is the main control unit of a computer(it's" brain"), which reads and performs program instructions and manages the tasks of input, output, and storage. Input devices allow us to enter text, numbers, graphics, sounds, etc. into a computer. An output device is hardware that returns processed data to users, such as a monitor or printer. Motherboard is the main circuit board of the computer;also called system board.