Chapter 2 :- Computer Hardware

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Chapter 2
COMPUTER HARDWARE
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In the end of the lesson, student should be able
to..

• Describe the main components of a computer
  system, hardware.
• Provide examples of hardware device that handle
  input, output, motherboard and storage task.
• differentiate type of input device and output
  device.

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1) Introduction of computer

• What is computer?
• A programmable machine. The two principal of
  characteristic of a computer are
• 1)It responds to a specific set of instructions
  in a well-defined manner.
• 2)It can execute a prerecorded list of
  instructions (a program).
• Evolution of computer
• (http//www.computerhistory.org/timeline/)

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Type of computer

• Computers can be generally classified by size and
  power as follows, though there is considerable
  overlap
• 1) personal computer
• 2) minicomputer
• 3) mainframe
• 4) supercomputer

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Computer system

• Collection of related component that have been
  designed to work together. Their perform four
  basic operations input, output, processing and
  storage.

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Overview of computer system
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Input

• What is input?
• Any data or instructions you enter into the
  memory of the computer
• Users can input data and instructions in a
  variety of ways.
• Example (keyboard,mouse etc)

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Overview of computer system
Process
Input
Output
Storage
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Process

• The execution of arithmetic or comparison
  operation on data.
• The devices is motherboard
• A large circuit board containing the computer
  central processing unit, support chips, random
  access memory, and expansion slots. Also called a
  main board.

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A motherboard
A RAM chip
Expansion slots
Pins to attach to motherboard
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Overview of computer system
Process
Input
Output
Storage
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Output

• The result of processing information that enable
  people to see, hear, and even feel that result.
• Example of device is
• 1.monitor
• 2.printer
• 3.speaker/earphone

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Overview of computer system
Process
Input
Output
Storage
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Storage

• Storage that the computer saves the result of
  processing to used again later.
• Storage devices hold all of the program and data
  that the computer uses.
• Example of devices is a hard disk, a floppy
  disk, CD ROM or DVD ROM.

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Activities
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Activities..

• Group 1. Present about the computer system.
• Group 2. Present the differences of input
  devices and output devices.