Transcript Chapter 2 :- Computer Hardware

Chapter 2
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.
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).
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Evolution of computer
(http://www.computerhistory.org/timeline/)
Type of computer
 Computers can be generally classified by size and power
as follows, though there is considerable overlap:
1)
2)
3)
4)
personal computer
minicomputer
mainframe
supercomputer
Computer system
Collection of related component that have been
designed to work together. Their perform four
basic operations: input, output, processing and
storage.
Overview of computer system
Input
Process
Storage
Output
 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)
Overview of computer system
Input
Process
Storage
Output
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.
A “motherboard”
A RAM chip
Expansion slots
Pins to attach to motherboard
Overview of computer system
Input
Process
Storage
Output
 The result of processing
information that enable
people to see, hear, and
even feel that result.
 Example of device is:

1.monitor
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2.printer
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3.speaker/earphone
Overview of computer system
Input
Process
Storage
Output
 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.
Activities
Activities..
Group 1. Present about the computer
system.
Group 2. Present the differences of
input devices and output
devices.