Computer HardwareUnit 1Computer Applications A

Hardware defined Physical parts of a computer Four main components of hardware

Input devices Processing unit Output devices Storage devices

Input Devices Transport data into the computer Keyboard Mouse Scanner Digital camera Microphone Joy stick Game controller Web cams Light pen

Processing Unit Commonly known as CPU (central

processing unit) The “brain” of the computer Contains computer chips and circuits

that control and manipulate data

Output devices Allows the user to see or hear the

information that the computer compiles Printer Monitor Speakers Hard drive Flash drives

Care of Computer and Peripherals System case should be cleaned, inside and

out Wipe with a damp cloth Use compressed air to blow out dust Use a small handheld vacuum to remove dust Check the power supply fan periodically to be

sure that it has good ventilation and is free of dirt and dust buildup

Turn monitors off at night to increase life span

Care, con’t. Keyboards can develop keys that stick

Develop a “no eating and drinking” policy at computer

Clean key caps every six months Use compressed air to blow out dust from

between keys Mice

Clean with damp cloth monthly