Computer
Hardware
Unit 1
Computer Applications A
Hardware defined
 Physical
parts of a computer
 Four main components of hardware
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Input devices
Processing unit
Output devices
Storage devices
Input Devices



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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
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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