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
7.
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
20.
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
22.
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