What
What is
is Computer
Computer
The Computer is an electronic device which
convert data into information.
Convert=පරිවර්තනය
Data=දත්ත
Information=තතොරතුරු
Electronic device
TV
Camera
Air conditioner
Washing Machine
Refrigerator
Blender
Microwave Oven
Digital Clock
Thermo meter
Rice Cooker
Main What
Functions
is Computer
of Computer
1)Input
2)Process
3)Out Put
.
Main What
Functions
is Computer
of Computer
 INPUT
Entering data and instruction to the
computer.
 PROCESS
Convert data into information according to
the instruction we give.
 OUTPUT
Giving out information from the computer.
.
Main What
Functions
is Computer
of Computer
.
Example
What
1-Washing
is Computer
clothes
Main steps
 Put dirty clothes to the washing machine
 Put detergent liquid to the washing
machine
 Water supply
Put=දමනවා
INPUTS
• Water
• Dirty clothes
• Washing powder/Liquid
Example 1-Washing Clothes
Main steps(Process)
• Washing machine filled with water
• Detergent liquid mix with water
• Dirty clothes mix with water and detergent
liquid
• The fan of the washing machine spins the dirty
clothes.
Example 1-Washing clothes
Main step
• Getting out cleaned clothes
Out put
• Cleaned clothes
Example
What2-Banana
is Computer
Shake
Example
What is3-Cup
Computer
of tea
What
Example
is Computer
4-Soup
Example
What is5-Sandwich
Computer
The Components
What is Computer
of a Human body
Keyboard
The Components
What is Computer
of a Computer
System Unit
Monitor
Speaker
Keyboard
Mouse
5-Sensors of Human Body
Digestive System
Main Category of Components
We can Categories those components according
to the functions they do.
Input Devices
Output Devices
Central Processing Unit
Main memory
Storage devices
Communication Devices
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Main Category
What is Computer
of Components
1) Input Devices
The devices which are used to enter Data and
instructions to computer are called Input
Devices
i
1) Mouse
What
Input
is Devices
Computer
i
2) Keyboard
What
Input
is Devices
Computer
15
14
13
1
2
3
4
10
8
6
9
5
7
11
12
1
Escape Key
=
6 =
2
=
Tab Key
7
3
=
Caps Lock
Key
8
4
=
Shift Key
9
5
=
Control Key
10
Windows Key
11 =
Arrow Keys
Alter Key
12 =
Numeric Keypad
Character
Keys
13 =
Delete Key
=
Space Bar
14 =
Backspace Key
=
Enter Key
15 =
Function Keys
=
=
3
=
Caps Lock Key
It helps to type Capital Letters.
9
=
Space Bar Key
It is used to give blank space between letters or words.
10
=
Enter Keys
They are used to move the Cursor to the next line
11 =
Arrow Keys
They are used to move the cursor Left , Right, Up and
Down
14 =
Backspace Key
It is used to delete space Between Letters or Words.
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What
Input
is Devices
Computer
3) Microphone
4) Barcode Reader
i
What
Input
is Devices
Computer
5) Scanner
6)Web Camera
i
Mouse
What
Input
is Devices
Computer
i
Keyboard
What
Input
is Devices
Computer
i
What
Input
is Devices
Computer
How to Connect Microphone
i
What
Input
is Devices
Computer
Barcode Reader
i
Scanner
What
Input
is Devices
Computer
i
Web Camera
What
Input
is Devices
Computer
i
Main Category
What is Computer
of Components
2) Output Devices
The devices which are used to retrieve the
data and information from the Computer are
called Output Devices.
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1) Monitor
2) Printer
What
Output
is Computer
Devices
i
4) Speaker
What
Output
is Computer
Devices
i
What
Output
is Computer
Devices
5) Multimedia Projector
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What
Output
is Computer
Devices
How to Connect Printer
i
What
Output
is Computer
Devices
How to Print Document
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What
Output
is Computer
Devices
How to Connect Multimedia Projector
i
Central
What
Processing
is Computer
Unit(CPU)
 It is the brain of a computer.
 Main function of CPU is Control the
computer and process data according to
the instructions given by the user.
 It is located in inside the system unit.
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Central
What
Processing
is Computer
Unit(CPU)
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Main
What
Memory(RAM)
is Computer
It is temporary storage of computer.
The device is used to store data , information
and instruction temporarily.
It is also called primary memory or Random
Access MemorY (RAM)
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Main
What
Memory(RAM)
is Computer
 Install RAM on Computer
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What
Storage
is Computer
Device
It is used to store data , Instruction and
information in the computer.
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What
Storage
is Computer
Device
 There are two type of Storage devices
1)Internal Storage Devices
2)External Storage Devices
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What
Storage
is Computer
Device
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What
Storage
is Computer
Device
 How to fix Hard Disk to the Computer.
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What
Storage
is Computer
Device
 How to Connect External Hard Disk to the
Computer.
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What
Storage
is Computer
Device
 Inside of the Hard Disk.
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Communication
What is Computer
Devices
The devices which are used to exchange the
data and information are called
communication devices.
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Communication
What is Computer
Devices
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Communication
What is Computer
Devices
 Wired Communication Devices
Device is connected to computer via
cable(wire).
 Wireless Communication Devices
Device is directly connected to the computer
without any cable.
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Communication
What is Computer
Devices
How to connect Router to the Computer
using Network Cable.
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Communication
What is Computer
Devices
How to connect NIC to the Computer using
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What is Hardware
Computer
All the tangible components of the computer
are called hardware.
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What
What isis Computer
software
A software is set of programmes designed to
execute certain task by using a computer.
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What
Type of
is Computer
software
1)Word processing software
Examples
Microsoft word
 it is used for prepare documents
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What
Type of
is Computer
software
2)Computer Games
Examples
The Witcher
 it is used for entertaining purposes
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What
Type of
is Computer
software
3)Painting software
Examples
Microsoft Paint
 it is used for draw pictures
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What
Type of
is Computer
software
4)Media player
Examples
Windows media player
 it is used for watch movies
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Application
What is of
Computer
Computers
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Application
What is of
Computer
Computers
1)Schools
 Computers ease(Simplify) the school
office work and increase the effectiveness.
Letter
 Computers are used in the leaning process
Instead of books and blackboard.
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Application
What is of
Computer
Computers
 Get additional subject knowledge by using
the internet.
Internet Icons
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Application
What is of
Computer
Computers
2)Banks
 ATM Machines can be used to deposit and
withdraw money.
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Application
What is of
Computer
Computers
 ATM cards can be used to pay bills when
purchasing goods..
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Application
What is of
Computer
Computers
 Use of internet banking and mobile
banking.
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Application
What is of
Computer
Computers
3)Hospitals
 Use of Digital thermometer as an
embedded computer device.
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Application
What is of
Computer
Computers
 Use of Computers and embedded
computer devices in ICU.
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Application
What is of
Computer
Computers
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Application
What is of
Computer
Computers
 Use of Computers and embedded
computer devices in Operation theatre.
Application of Computers
4)Factories
 Human labour is replaced by Computer
Devices. Therefore Production is
increased.
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Application of Computers
Application of Computers
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Application
What is of
Computer
Computers
 Use of Robotic technologies ease the work
in industrial sector.
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Application
What is of
Computer
Computers
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Application
What is of
Computer
Computers
5)Agriculture
Embedded computer devices are used in
harvesting, weeding and water supplying.
Therefore productivity is increased while
minimizing the expenditure.
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Application
What is of
Computer
Computers
 Harvesting
.
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Application
What is of
Computer
Computers
 Weeding
.
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Application
What is of
Computer
Computers
 Watering (Supplying, water and Fertilizer)
.
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Embedded
What Computer
is Computer
System
Devices which are operated using computer
programmes included in the device called
Embedded computer system.
Examples
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Embedded
What Computer
is Computer
System
Modern Camera
Modern Rice Cooker
Modern Refrigerator
Modern Microwave Oven
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Embedded
What Computer
is Computer
System
Modern Air Conditioner
Modern Blender
Digital Thermometer
Digital Clock
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Features
What isofComputer
Computer
 Speed and Efficiency
It can finish any given task very short time
period.
 Accuracy
Always provides corrects outputs When
correct inputs are given
 Reliability
You can trust process and output.
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Features
What isofComputer
Computer
 Consistency
It provides consistent output when same
input is given.
 Storage capacity
It can store large amount of data, information
and instruction.
 Cost
Purchasing cost is high but maintain cost is
low.
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Features
What isofComputer
Computer
 Intelligence
It can work according to the given instruction
but can not made it’s own desertion.