1. Computer Hardware Unit 1 Computer Applications A

2. Hardware defined  Physical parts of a computer  Four main components of hardware  Input devices  Processing unit  Output devices  Storage devices

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

4. Processing Unit  Commonly known as CPU (central processing unit)  The “brain” of the computer  Contains computer chips and circuits that control and manipulate data

5. Output devices  Allows the user to see or hear the information that the computer compiles  Printer  Monitor  Speakers  Hard drive  Flash drives

6. 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

7. 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