Computer Application- ICIT 1.Advantages & Disadvantages Keyboards 2. Pointing Devices 3. Locator Devices 4. Digitizing Tablets 5. Mechanical Mouse

1. TRINITY INSTITUTE OF PROFESSIONAL
STUDIESSector – 9, DwarkaInstitutional Area, New Delhi-75
Affiliated Institution of G.G.S.IP.U, Delhi
ICIT(10107)
Submitted By :Submitted By :
Priyanka AttriPriyanka Attri
(Assistant Professor)(Assistant Professor)

2. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
Input
•Data or instructions
•Directly from user
•From other sources
•Input device
•Hardware to provide input to computer

3. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
Input Devices
•Keyboards
•Pointing devices
•Scanners
•Image capture devices
•Audio capture

4. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
Keyboards
•Characters, numbers, symbols converted to
electrical signal that can be understood by
computers.
•Modern keyboards-QWERTY keyboard
•Types of cursor-vertical line, underscore, or
bright blinking video.
•101 keys
•Type of cursor dependent on application
package

5. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
•101 keys
•Transcription-Copying data from
paperdocuments
USES
•Typing letters, memos, reports
•Documents using word processing software
Typewriter keyboard, numeric keypad, special keys
Navigation keys, Function keys, Windows key

6. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
KEYBOARDKEYBOARD
•Toggle keys
•Turns a feature on or off
•Caps Lock
•Combination keys
•Held down in combination with another key
•Control key, Alt key

7. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
Advantages & Disadvantages
Keyboards
• Advantage
• Skilled typist types very fast
• Disadvantage
• Easy to make mistakes when typing data
• Very difficult to enter some data-diagrams,pictures
• Very time consuming if not skilled in typing

8. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
Pointing Devices
•Joystick
•Popular for computer games
•User grips stick to maneuver
•Touch screen
•Special monitor
•Screen layer with crisscrossed beams of infrared
light
•Select by touching screen directly

9. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
•Trackball
•Move roller ball with thumb
•Touch surface (in laptops)
•Move finger across surface of pad
•Tap to select
•Pointing stick
•Middle of keyboard
•Move with finger

10. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
Locator Devices
•Control the location or position of the cursor on the
screen.
•Allows quick movement of cursor in text or graphic file
•Current position can be seen visually with arrows
•Good for gross movement not for precision work
•Types of locator devices:
•Digitizing Tablets
•Mouse
•Track Ball
•Joystick

11. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
Digitizing Tablets
•Electronic plastic board
•Absolute locator-very precise
•When stylus is placed on a particular position same
signals are produced each time
•Digitizing tablet is a flat surface
•Contain hundreds of copper wires forming a grid
•Each copper wire receives electric pulses
•Stylus-like pen
•Helps to draw sketches

12. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
Digitizing Tablets
Uses:
1.CAD(Computer Aided Design)
2.Geographical Information
System(GIS)-digitizing maps

13. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
Mouse
Hand held devices
Control a pointer on the monitor
Rolled over mouse pad
Relative locator
Used to select buttons, menus, links
Types of Mouse
Mechanical
Optical
Wireless

14. TRINITY INSTITUTE OF PROFESSIONAL STUDIES
Sector – 9, DwarkaInstitutional Area, New Delhi-75
Mechanical Mouse
•Known as Physical mouse
•Has ball that protrudes
•Friction causes the ball to move
•Potentiometers-sense the direction ,
rate of movement of a ball
•Converted into electrical signals

15. 09/22/15