Intro to Computer

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3. *Input Devices
• Any thing given to computer is called
input
• A hardware component which is used to
enter data into the computer is called
input devices.
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4. Input Devices
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• Keyboards
• Mouse
• Touch Screen
• Scanner
• Microphones
• Digital cameras

5. Keyboard
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Used for typing text into the computer.

6. Keys On Keyboard
Types of keys on a computer keyboard:
•Alphanumeric keys – Consist of letters and
numbers.( A-Z and 0-9)
•Punctuation keys – Include punctuation &
mathematical operators.
• Special keys – Include function keys, control keys,
arrow keys, caps lock key, delete key, etc.
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7. Special keys on Keyboard
• Alt key – Short for Alternate, this key is like a second control key.
• Arrow Keys – Four arrow keys that enable you to move the cursor
up, down, right, or left.
• Backspace key – Deletes the character backward
• Caps Lock Key- Causes all alphabetic characters to be uppercase.
• Ctrl key – Short for Control, used in combinations with other keys
to produce control characters.
• Enter Key – move the cursor to the beginning of the next line.
• Esc Key – Short for Escape, this key is used to exit from programs
and tasks.
• Function Keys – F1 to F12.
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8. Mouse
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Input Devices- Mouse• A input device that is used to point & select items on
the computer screen.
Buttons:
• Primary button
• Secondary button
Wheel:
Which allows to scroll for up & down option.

9. Touch Screen
• Video Display Screen
• Receive Input from Touch of finger
• There are invisible electromagnetic light behind the
screen
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Scanner
 Scanner is a light sensitive device
 Helps us to copy or capture images & artwork that
exist on paper.
 Display on screen

11. Digital Camera
• Better quality
• It store images in its memory
• Stored images transformed in to the system
• Allow the user to edit a pictures
• Making pictures is inexpensive & fast
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12. Micro phones
• Record audio data such as human voice
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13. Joystick
Two Parts:
• Base & Stick
• Usually used in playing games
• Used stick to move an object
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14. Now You Are Free To Ask Q.s
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