This document appears to be a presentation on input and output devices for computers. It was presented by four students - Kasak Malviya, Meena Bakoriya, Laxmi Katare, and Priyanka Saraswal - at Rai Saheb Bhanwar Singh College in Nasrullaganj on May 20, 2018 under the guidance of their professor Mr. Sanjay Sir. The presentation covers various input devices like keyboards, mice, and scanners, as well as output devices like monitors, printers, and speakers. It discusses the purpose and specifications of these devices and how they allow users to interact with computers.

1. WEL-COME

2. Computers Are Your Future Chapter 5
RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
TOPIC:- Input And Output Devices
SUBMITTED BY:-
KASAK MALVIYA
MEENA BAKORIYA
LAXMI KATARE
PRIYANKA SARASWAL
SUBMITTED TO:-
MR SANJAY SIR
5/20/2018 2
RAI SAHEB BHANWAR SINGH COLLEGE
NASRULLAGANJ

3. PRESENTED BY
KASAK MALVIYA
MEENA BAKORIYA
LAXMI KATARE
PRIYANKA SARASWAL
5/20/2018
3
RAI SAHEB
BHANWAR SINGH

4. GUIDED BY
MR. SANJAY SIR
DEPARTMENT OF COMPUTER SCIENCE
RAI SAHEB BHANWAR SINGH COLLEGE
NASRULLAGANJ
4
RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ

5. PRESENTED ON
Input And Output
Devices
5/20/2018
5
RAI SAHEB
BHANWAR SINGH

6. Input And Output
Devices

7. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 7
Input And Output Devices
Input/Output

8. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 8
What You Will Learn About
 The purpose of special keys and the most frequently
used pointing devices
 Input devices used to get audio and digital data into the
computer
 The characteristics of a monitor’s quality and the various
types of monitors
 The two major types of printers
 The difference between memory and storage

9. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 9
What You Will Learn About
 The categories of storage devices
 The performance characteristics of hard drives
 How data is stored on both hard and floppy disks
 The various optical storage media available for
personal computers

10. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 10
Input
 Input is any data entered into the computer’s
memory.
 Types of input include:
 Data – Unorganized information (words, numbers,
images, or sounds) that the computer converts to
meaningful information
 Software – Programs transferred from storage devices to
the computer’s memory
 Commands – Instructions that tell the computer what to
do
 Responses – Prompts requiring user feedback

11. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 11
Input Devices: Giving Commands
Keyboard
Mouse
Other Pointing
Devices

12. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 18
Audio Input
 Computers can accept input from a microphone.
 An expansion card called a sound card records and
plays back sound files.
 Sound files contain digitized sound data.
 Popular sound file formats include:
Windows WAV
Moving Pictures Expert Group (MPEG)
MP2 and MP3
Musical Instrument Digital Interface (MIDI)

13. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 19
Audio Input: Speech Recognition
 Speech recognition is a type
of input in which the
computer recognizes words
spoken into a microphone.
 Special software and a
microphone are required.
 Latest technology uses
continuous speech recognition
where the user does not have
to pause between words.

14. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 20
Digital Cameras
Digital Video
Click on the
picture to play
the video.
Digital Input: Digital Cameras and
Digital Video

15. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 21
Scanners
Flatbed
Fax Machines
Alternative Input Devices
Barcode reader

16. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 24
Output Devices: Engaging our Senses
 Output devices are peripheral devices that enable us
to view or hear the computer’s processed data.
 Visual output – Text, graphics, and video
 Audio output – Sounds, music, and synthesized speech

17. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 25
Monitors
 A monitor is a peripheral device which displays
computer output on a screen.
 Screen output is referred to as soft copy.
 Types of monitors:
 Cathode-ray tube (CRT)
 Liquid Crystal Display (LCD or flat-panel)
CRT LCD

18. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 28
Monitor Specifications
 Screen size – The diagonal measurement of the screen surface
in inches (15, 17, 19, 21)
 Resolution – The sharpness of the image determined by the
number of horizontal and vertical dots (pixels) that the screen
can display (800 x 600, 1024 x 768, 1600 x 1200)
 Refresh rate – The speed at which the screen is redrawn
(refreshed) and measured in Hertz (Hz) (60Hz, 75Hz)

19. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 29
Printers
A printer is a peripheral
device that produces a
physical copy or hard
copy of the computer’s
output.

20. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 30
Inkjet Laser
Types of Printers
 Inkjet printer, also called a
bubble-jet, makes characters
by inserting dots of ink onto
paper
 Letter-quality printouts
 Cost of printer is inexpensive
but ink is costly
 Laser printer works like a
copier
 Quality determined by dots
per inch (dpi) produced
 Color printers available
 Expensive initial costs but
cheaper to operate per page

21. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 31
Plotter
 A plotter is a printer that uses a pen that moves over a
large revolving sheet of paper.
 It is used in engineering, drafting, map making, and
seismology.

22. RAI SAHEB BHANWAR SINGH
COLLEGE NASRULLAGANJ
Slide 32
WMA MIDI MP3 WAV
Beethoven
1:15 min
Rocky
2:56 min
Hornsby
48 sec
Cheers
15 sec
Click an icon
to play
music.
Click the icon
again to stop
playing.
Try clicking on
Cheers while
playing music.
Audio Output: Sound Cards and Speakers
 Audio output is the ability of the computer to output
sound.
 Two components are needed:
 Sound card – Plays contents of digitized recordings
 Speakers – Attach to sound card

23. THANK YOU
5/20/2018
33
RAI SAHEB
BHANWAR SINGH