1. Unit 1 Computer Applications A
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 Mice
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