1. Input devices allow users to enter data and instructions into a computer and include keyboards, mice, touchscreens, barcode readers, digital cameras, trackballs, scanners, microphones, and video cameras. 2. Output devices convey processed information from the computer to users and include computer monitors, printers, plotters, speakers, headphones, and microfilm devices. 3. Common input devices allow entering of text, numbers, images, audio, and video as well as programs and commands, while output devices visually display information or produce hard copies of results.

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