Understanding input devices ICT.pptx slides

Your Interactive Guide to
the Digital World
Discovering
Computers 2012
Chapter 5
Understanding Input

2
Objectives Overview
Define input and differentiate
among a program, command, and
user response
Identify the keys and buttons
commonly found on desktop
computer keyboards, and
describe how keyboards for
mobile computers and devices
differ from desktop computer
keyboards
Describe different mouse types
and explain how to use a mouse
Describe various types of touch
screens and explain how a touch-
sensitive pad works
Describe various types of pen
input, and identify other types of
input for smart phones
Summarize the purpose of
various game controllers
Discovering Computers 2012: Chapter 5
See Page 257
for Detailed Objectives

3
Objectives Overview
Explain how resolution
affects the quality of a
picture captured on a
digital camera
Describe the uses of
voice recognition,
Web cams, and video
conferencing
Discuss how various
scanners and reading
devices work
Summarize the various
biometric devices
Discuss how POS
terminals, automated
teller machines, and
DVD kiosks work
Identify alternative
input devices for
physically challenged
users
See Page 257
for Detailed Objectives

4
What Is Input?
• Input is any data and instructions entered into the
memory of a computer
Pages 258 – 259
Figure 5-1

5
What Is Input?
Pages 258 - 259
• Instructions can be entered into the computer in the
form of programs, commands, and user responses
A program is a series of related instructions that tells
a computer what tasks to perform and how to
perform them
Programs respond to commands that a user issues
A user response is an instruction a user issues by
replying to a question displayed by a program

6
What Are Input Devices
An input device
is any hardware
component that
allows users to
enter data and
instructions into
a computer
Page 260

7
The Keyboard
• A keyboard is an input device that contains keys
users press to enter data and instructions into a
computer
Page 260
Figure 5-2

8
The Keyboard
Pages 260 - 261
• Most desktop computer keyboards have…
Between 101 and
105 keys
A numeric keypad
on the right side of
the keyboard
Function keys,
CTRL keys, ALT
keys, and arrow
keys
WINDOWS key APPLICATION key Toggle keys

9
The Keyboard
• The insertion point, also known as the cursor, is a
symbol on the screen that indicates where the
next character you type will appear
Page 261
Figure 5-3

10
The Keyboard
USB port
Wired
Keyboards
Bluetooth
IrDA
Wireless
Keyboards
Page 262
Infrared Data
Association

11
The Keyboard
• An ergonomic keyboard has a design that reduces
the chance of wrist and hand injuries
• Ergonomics incorporates comfort, efficiency, and
safety into the design of the workplace
Page 262
Figure 5-4

12
The Keyboard
• Keyboards on mobile devices typically are smaller
and/or have fewer keys
• Some phones have predictive text input, which
saves time when entering text using the phone’s
keypad
Pages 262 – 263
Figure 5-5

13
Pointing Devices
A pointing device is an
input device that allows
a user to control a
pointer on the screen
A pointer is a small
symbol on the screen
whose location and
shape change as a user
moves a pointing device
Page 263

14
Mouse
• A mouse is a pointing device that fits under the
palm of your hand comfortably
– Most widely used pointing device on desktop
computers
• A mouse can be wired or wireless
Pages 263 – 264
Figures 5-6 and 5-7

15
Mouse
• Mouse operations
Page 264
Figure 5-8
Point Click Right-click Double-click
Triple-click Drag Right-drag
Rotate
wheel
Free-spin
wheel
Press wheel Tilt wheel
Press thumb
button

Understanding input devices ICT.pptx slides

More Related Content

Similar to Understanding input devices ICT.pptx slides

Recently uploaded

Understanding input devices ICT.pptx slides