Yogen der Palli 1 - Session -1 Session-1 Keyboard & Mouse
Yogender Palli
1 - Session -1
Session-1Keyboard & Mouse
Yogender Palli
2 - Session -1
Keyboard &
Mouse
Yogender Palli
3 - Session -1
Function Keys Special Keys
Numeric Keys
Alphabet Keys
Cursor KeysNumeric KeypadOthers are Command Keys
Yogender Palli
4 - Session -1
Function Keys
Yogender Palli
5 - Session -1
Special Keys
Yogender Palli
6 - Session -1
Up Cursor Key
Down Cursor
Key
Left Cursor
Key
Right Cursor
Key
Cursor Keys
Yogender Palli
7 - Session -1
Numeric Keys
3) Hash
4) Dollar Sign
5) Percentage
1) Exclamation Mark2) At The Rate of
8) Star or Multiply9) Open Bracket
6) Power
7) And
10) Close Bracket
Yogender Palli
8 - Session -1
Numeric Key Pad
Yogender Palli
9 - Session -1
Alphabet Keys
Yogender Palli
10 - Session -1
Command Keys
Escape Button
Backspace Button
Windows/Start Button
Right Click Button
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11 - Session -1
Command Keys contd..
Shift Button
Tab Button
Caps Lock Button
Enter Button
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12 - Session -1
Command Keys contd..
Open Flower BracketOpen Square Bracket
Closed Flower BracketClosed Square Bracket
Less Than SignComma Sign
Greater Than SignFull Stop Sign
Yogender Palli
13 - Session -1
Command Keys contd..
Double Inverted CommasSingle Inverted Commas
Colon Semi Colon
Vertical BarBack Slash
Question MarkForward Slash
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14 - Session -1
Command Keys contd..
Hyphen or Minus Underscore
Tilde Left Quote
PlusEquals
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15 - Session -1
Command Keys contd..
Alternate Button
Spacebar Button
Control Button
Yogender Palli
16 - Session -1
Mouse
Yogender Palli
17 - Session -1
Mouse Buttons
This is Mouse Left Click
This is Mouse Right Click
Yogender Palli
18 - Session -1
What is a Computer?
Computer is an electronic device. It performs these functions:
1. It collects an input data2. It processes the data3. It gives an output data
Yogender Palli
19 - Session -1
The Role of Computers
Business
Medical
Space Research
Education Graphics
Entertainment
Defense
Industrial Use
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20 - Session -1
1. Input Devices (Keyboard, Mouse, etc.)
2. Output Devices (Monitor, Printer, Speakers, etc.)
3. Central Processing Unit (CPU) and Memory
4. Mother Board (Circuit Board)
5. Expansion Cards (Video Card, Sound Card)
6. Hard Drive Ports & Connections (USB, Fire wire, etc.)
HARDWARE & SOFTWARE
Yogender Palli
21 - Session -1
1. Physical components of the computer are called
hardware.
2. You can touch, see and feel the hardware.
3. Hardware is constructed using physical materials or
components.
4. Computer is a hardware device, which operates under
the control of a software.
HardwareHardware
Components
Yogender Palli
22 - Session -1
5. If hardware is damaged, it can be repaired or replaced with
new unit.
6. Hardware is not affected by computer viruses.
7. Hardware cannot be transferred from one place to another
electronically through network.
8. User cannot make new duplicate copies of the hardware
Hardware contd..
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23 - Session -1
• Mouse
• Keyboard
• Microphone
• Scanner
• Webcam
Examples of Hardware Components
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24 - Session -1
Software
1. A set of instructions given to the computer is called “Software”.
2. You cannot touch and feel Software.
3. Software is developed by writing instructions in a programming Language
4. The operations of computer are controlled through software.
5. If software is damaged or corrupted, its backup copy can be reinstalled.
6. Software is affected by computer viruses.
7. User can make new copies of the software.
Yogender Palli
25 - Session -1
Examples of System Software
MS Office
Adobe Photoshop
Tally
Movie Players
Internet Browser
Yogender Palli
26 - Session -1
Classification of Computers
Computers can be classified based on size, cost, storage capacity, speed and nature of operations they can perform.
1. Microcomputers (Personal Computer) A microcomputer is the smallest general purpose processing system. The older PCs started with 8-bit processor with speed of 3.7MB.The current PCs have 64-bit processor with speed of 4.66 GB. Examples: IBM PCs, APPLE Computers
The different types of computer are:
Yogender Palli
27 - Session -1
b. Laptop: It is similar to a desktop which can be placed on your lap
a. Desktop Computer : which can be placed on a desk
c. Palmtop (Hand-held): which can be placed on your palm
TIP : Both Laptops and Palmtops can be carried around while travelling
1. Microcomputers
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28 - Session -1
2. Mini Computer: A minicomputer is a medium-sized computer that is more powerful than a microcomputer. These computers are usually designed to serve multiple users simultaneously (Parallel Processing). They are more expensive than microcomputers. Examples: Digital Alpha, Sun Ultra.
Mainframe Computers
Mini Computer
3. Mainframe Computer: Mainframe Computers are more powerful and costlier than minicomputers. These computers operate at very high speeds, have very large storage capacities and can support hundreds of users. These computers consume more electricity. They are used by large scale organizations.
Yogender Palli
29 - Session -1
4. Super Computer: Supercomputers are very huge and they can be as big as a room. They are also the fastest and costliest computers. They are used in fields like scientific research and defense. These computers are used in rocket launches, aircraft , and weather forecasting.
Yogender Palli
30 - Session -1
Computers today are becoming an important part of our lives as pen and paper were about fifty years ago. There can be no denying that this is because of many benefits we get from using computers. The many advantages of computers include:
Advantages of Computers
Computers have made lot of computational and clerical work easy.
Computers have made many tasks of modern life like buying and banking more convenient. We can shop and bank from our homes any time of the day and night.
Computers have given easy access to lot of useful information through the Internet.
Computers have made it easy for us to communicate and keep in touch with others.
Computers have made available to us many new forms of entertainment like computer games.
Yogender Palli
31 - Session -1
Questions
1. What are the Keyboard Command Buttons?
2. What are the Key Board Functions keys?
3. What is the definition of Computer?
4. What is the Role of Computer ?
5. Write two examples of Hardware & Software.
6. Write a brief on classification of Computers.