INPUT AND OUTPUT DEVICES.

2. FUNDAMENTAL OF INFORMATION
SYSTEM
Presentaion
INPUT AND OUTPUT DEVICES

3. Raja Umair Arshed
BBA III

5. WHAT IS INPUT?
What is input?
 Data or instructions entered into memory of
computer
 Input device is any hardware component that
allows users to enter data and instructions

6. WHAT IS INPUT?
What are the two types of input?
 Data
 Unprocessed text,
numbers, images,
audio, and video
 Instructions
 Programs
 Commands
 User responses

8. KEYBOARD
 Similar to typewriter keyboard.
 Keys on keyboard consist up of letters, numbers,
symbols and function keys.
 Special keys like Tab, Del, Ctrl, PgUp, PgDn,etc.
 Easy to use and offers number of facilities.
 Can edit the input data very easily.
 Relatively inexpensive.

9. MOUSE
 A pointing device.
 Control and manipulate cursor movement on monitor.
 Has three or four buttons on it and roller ball which
signals the movements on a flat surface.
 Move fast from one part of the screen to the other.

10. POINTING DEVICES
What are common mouse operations?
Point
Double- Triple- Right-
Click
click click click
Right-
Drag
drag
Free- Press
Rotate Tilt
spin wheel
wheel wheel
wheel button

11. TOUCH SCREEN
 A touch panel is transparent plate.
 Input is registered when a finger or any other object
comes in contact with the plate.

12. BAR CODE READER
 It reads bar coded data.
 Laser beam scanner is used to read the bar code.
 Most commonly used bar code is the Universal
Product Code (UPC).

13. DIGITAL CAMERAS
 What is a digital camera?
 Allows you to take
digital pictures
 Images viewable
immediately on
camera
 Download to
computer
 Post pictures
to Web
Next

14. TRACK BALL
 Also known as roller ball.
 Uses a hard sphere to control cursor movement.
 Ball can be rotated in any direction by hand.
 This digital signal in translated to control the cursor
movement on the screen.

15. SCANNER
 It is able to directly enter text and images into the
computer memory.
 Eliminated the duplication work of entering data .
 This result into increase in speed of data entry
and accuracy.

16. VOICE RECOGNITION SYSTEM
 Uses microphone or telephone, a sound card an
special software.
 Voice recognition system are highly operator
dependent.
 Reduces the cost of data entry.
 Can move freely while talking into the computer.

17. JOYSTICK
 Widely used in computer or video games.
 The direction and speed with which the joystick is moved
is converted into digital signal and sent to the computer
system.
 This in turn controls the movement of the cursor on the
screen.

18. VOICE INPUT
 What is voice input?
 The process of entering input by speaking into
a microphone
 Voice recognition is the computer’s capability
of distinguishing spoken words

19. VIDEO INPUT
What is a PC video camera and a Web
cam?
PC video camera is used to capture video and still
images, and to make video telephone calls on Internet
 Also called PC camera
 Web cam — video camera
c c
whose output displays on
a Web page

21. WHAT IS OUTPUT?
What is output?
 Data that has been processed into a useful form
 Output device is any hardware component that can convey
information to one or more people

23. DISPLAY DEVICES
What is a display
device?device that visually conveys text,
Output
graphics, and video information
 Information on display device sometimes
called soft copy
 Monitor houses display device that is packaged
as separate peripheral

24. MONITORS
 Monitor is a device like
television screen which
is used to display information
 The resolution of monitors
is the number of picture elements
 Monitors are of two types
 Cathode Ray Tube Monitor (CRT)
 Flat Panel Display

25. PRINTER
 Itproduces the output from the
computer on the paper.
 Produces a hard copy i.e. permanent
copy of the result which can be stored
and read later.
 ImpactPrinters
 Non-Impact Printers

26. PLOTTER
A plotter is a an output device
used in applications where
printouts of graphs and
drawings are required
 Plotters are of two types
 Flat
Bed Plotter
 Drum Plotters

27. SPEAKERS, HEADPHONES, AND EARPHONES
What is an audio output device?
 Computer component that produces music, speech, or
other sounds
 Speakers and headsets are common devices

28. COMPUTER MICROFILM OUTPUT (COM)
 This technology is used to record computer output
as a microscopic film images.
 Information is recorded on a roll of film.
 COM devices are used applications where there are
large volumes of data.
 They are much more faster than normal printers
 Sophisticated & Expensive