1.
Discovering
Computers 2011
Living in a Digital World

2.
Objectives Overview
Identify the keys and buttons
commonly found on desktop
Define input and differentiate computer keyboards, and
Describe different mouse types
among a program, command, and describe how keyboards for
and explain how to use a mouse
user response mobile computers and devices
differ from desktop computer
keyboards
Describe various types of touch Describe various types of pen
Summarize the purpose of various
screens and explain how a touch- input, and identify other types of
game controllers
sensitive pad works input for smart phones
See Page 257 Discovering Computers 2011: Living in a Digital World 2
for Detailed Objectives Chapter 5

3.
Objectives Overview
Explain how resolution Describe the uses of
Discuss how various
affects the quality of a voice recognition,
scanners and reading
picture captured on a Web cams, and video
devices work
digital camera conferencing
Discuss how POS Identify alternative
Summarize the various terminals, automated input devices for
biometric devices teller machines, and physically challenged
DVD kiosks work users
See Page 257 Discovering Computers 2011: Living in a Digital World 3
for Detailed Objectives Chapter 5

4.
What Is Input?
• Input is any data and instructions entered into the
memory of a computer
Pages 258 – 259 Discovering Computers 2011: Living in a Digital World 4
Figure 5-1 Chapter 5

5.
What Is Input?
• 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
Pages 258 - 259 Discovering Computers 2011: Living in a Digital World 5
Chapter 5

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 Discovering Computers 2011: Living in a Digital World 6
Chapter 5

7.
The Keyboard
• A keyboard is an input device that contains keys
users press to enter data and instructions into a
computer
Page 260 Discovering Computers 2011: Living in a Digital World 7
Figure 5-2 Chapter 5

8.
The Keyboard
• Most desktop computer keyboards have…
Pages 260 - 261 Discovering Computers 2011: Living in a Digital World 8
Chapter 5

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 Discovering Computers 2011: Living in a Digital World 9
Figure 5-3 Chapter 5

10.
The Keyboard
Wired Wireless
Keyboards Keyboards
USB port Bluetooth
IrDA
Page 262 Discovering Computers 2011: Living in a Digital World 10
Chapter 5

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
Click to view Web Link,
click Chapter 5, Click Web
Link from left navigation,
then click Ergonomics
below Chapter 5
Page 262 Discovering Computers 2011: Living in a Digital World 11
Figure 5-4 Chapter 5

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 Discovering Computers 2011: Living in a Digital World 12
Figure 5-5 Chapter 5

13.
Pointing Devices
Page 263 Discovering Computers 2011: Living in a Digital World 13
Chapter 5

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 Discovering Computers 2011: Living in a Digital World 14
Figures 5-6 and 5-7 Chapter 5

15.
Mouse
• Mouse operations
Point Click Right-click Double-click
Rotate
Triple-click Drag Right-drag
wheel
Free-spin Press thumb
Press wheel Tilt wheel
wheel button
Page 264 Discovering Computers 2011: Living in a Digital World 15
Figure 5-8 Chapter 5

16.
Other Pointing Devices
Trackball
Touchpad
Pointing Stick
• A trackball is a • A touchpad is • A pointing
stationary a small, flat, stick is a
pointing rectangular pressure-
device with a pointing sensitive
ball on its top device that is pointing
or side sensitive to device shaped
pressure and like a pencil
motion eraser that is
positioned
between keys
on a keyboard
Pages 265 – 266 Discovering Computers 2011: Living in a Digital World 16
Figures 5-9 – 5-11 Chapter 5

17.
Touch Screens and Touch-Sensitive Pads
• A touch screen is a touch-sensitive display device
Click to view Web Link,
click Chapter 5, Click Web
Link from left navigation,
then click Multi-Touch Screens
below Chapter 5
Page 266 Discovering Computers 2011: Living in a Digital World 17
Figures 5-12 – 5-13 Chapter 5

18.
Touch Screens and Touch-Sensitive Pads
Microsoft Surface Touch-sensitive pads
Page 267 Discovering Computers 2011: Living in a Digital World 18
Figures 5-14 – 5-15 Chapter 5

19.
Pen Input
• With pen input, you touch a stylus or digital pen on a flat
surface to write, draw, or make selections
Click to view Web Link,
click Chapter 5, Click Web
Link from left navigation,
then click Signature Capture
Pads below Chapter 5
Page 268 Discovering Computers 2011: Living in a Digital World 19
Figure 5-16 Chapter 5

20.
Other Input for Smart Phones
Page 269 Discovering Computers 2011: Living in a Digital World 20
Figures 5-17 – 5-18 Chapter 5

21.
Game Controllers
• Video games and computer games use a game controller
as the input device that directs movements and actions
of on-screen objects
Joysticks and
Gamepads Light guns
Wheels
Motion-
Dance pads sensing
Click to view Web Link,
click Chapter 5, Click Web
Link from left navigation,
controllers
then click Game Controllers
below Chapter 5
Pages 270 - 271 Discovering Computers 2011: Living in a Digital World 21
Chapter 5

22.
Game Controllers
Page 270 Discovering Computers 2011: Living in a Digital World 22
Figure 5-19 Chapter 5

23.
Digital Cameras
• A digital camera is a mobile device that allows
users to take pictures and store them digitally
Studio cameras
Field cameras
Point-and-shoot camera
Page 272 Discovering Computers 2011: Living in a Digital World 23
Chapter 5

24.
Digital Cameras
Page 272 Discovering Computers 2011: Living in a Digital World 24
Figure 5-20 Chapter 5

25.
Digital Cameras
• Two factors affect the quality of digital camera photos:
• Resolution is the number of horizontal
and vertical pictures in a display device
Resolution • A pixel is the smallest element in an
electronic display
Number of bits • Each pixel consists of one or more bits of
data
stored in each • The more bits used to represent a pixel,
the more colors and shades of gray that
pixel can be represented
Page 273 Discovering Computers 2011: Living in a Digital World 25
Chapter 5

26.
Voice Input
• Voice input is the
process of entering
input by speaking into a
microphone
• Voice recognition is the
computer’s capability of
distinguishing spoken
words
Page 274 Discovering Computers 2011: Living in a Digital World 26
Figure 5-22 Chapter 5

27.
Voice Input
• Audio input is the process of entering any sound
into the computer
Speech
Music
Sound Effects
Page 274 Discovering Computers 2011: Living in a Digital World 27
Chapter 5

28.
Voice Input
• Music production software allows users to record,
compose, mix, and edit music and sounds
Page 274 Discovering Computers 2011: Living in a Digital World 28
Figure 5-23 Chapter 5

29.
Video Input
• Video input is the process of capturing full-motion images and
storing them on a computer’s storage medium
Record video on a digital video (DV) camera or use a
video capture card to convert analog signals to digital
Connect the camera to a port on the system unit
Transfer video and images
Page 275 Discovering Computers 2011: Living in a Digital World 29
Chapter 5

30.
Video Input
Page 275 Discovering Computers 2011: Living in a Digital World 30
Figure 5-24 Chapter 5

31.
Video Input
• A Web cam is a type of digital video camera that
enables a user to:
Send e-mail
Capture video and Add live images to
messages with
still images instant messages
video attachments
Broadcast live
Make video
images over the
telephone calls
Click to view Web Link, Internet
click Chapter 5, Click Web
Link from left navigation,
then click Web Cams
below Chapter 5
Pages 275 - 276 Discovering Computers 2011: Living in a Digital World 31
Chapter 5

32.
Video Input
• A video conference is a meeting between two or
more geographically separated people
Pages 276 – 277 Discovering Computers 2011: Living in a Digital World 32
Figures 5-25 – 5-26 Chapter 5

33.
Scanners and Reading Devices
Flatbed
Pen or Handheld
Sheet-fed
Drum
Page 277 Discovering Computers 2011: Living in a Digital World 33
Figure 5-27 Chapter 5

34.
Scanners and Reading Devices
Page 278 Discovering Computers 2011: Living in a Digital World 34
Figure 5-28 Chapter 5

35.
Scanners and Reading Devices
• Optical character recognition (OCR) involves reading
characters from ordinary documents
• A turnaround document is a document you return to the
company that creates and sends it
Page 279 Discovering Computers 2011: Living in a Digital World 35
Figures 5-29 – 5-30 Chapter 5

36.
Scanners and Reading Devices
• Optical mark
recognition (OMR)
reads hand-drawn
marks such as small
circles or rectangles
• An OMR device scans
the documents and
matches the patterns of
light
Page 279 Discovering Computers 2011: Living in a Digital World 36
Figure 5-31 Chapter 5

37.
Scanners and Reading Devices
• A bar code reader, also
called a bar code
scanner uses laser
beams to read bar
codes
Click to view Web Link,
click Chapter 5, Click Web
Link from left navigation,
then click Bar Code Readers
below Chapter 5
Page 280 Discovering Computers 2011: Living in a Digital World 37
Figure 5-32 Chapter 5

38.
Scanners and Reading Devices
• RFID (radio frequency identification) uses radio signals to
communicate with a tag placed in or attached to an object
• An RFID reader reads information on the tag via radio waves
• RFID can track:
Tracking times of
Tracking location Employee Checking lift
runners in a Airline baggage
of soldiers wardrobes tickets of skiers
marathon
Gauging pressure
Managing Checking out Tracking toll
and temperature
inventory library books payments
of tires
Page 280 Discovering Computers 2011: Living in a Digital World 38
Chapter 5

39.
Scanners and Reading Devices
• Magnetic stripe card readers read the magnetic
stripe on the back of cards such as:
Credit cards
Entertainment cards
Bank cards
Other similar cards
Page 281 Discovering Computers 2011: Living in a Digital World 39
Figure 5-34 Chapter 5

40.
Scanners and Reading Devices
• MICR (magnetic ink character recognition) devices read text
printed with magnetized ink
• An MICR reader converts MICR characters into a form the
computer can process
• Banking industry uses MICR for check processing
Page 281 Discovering Computers 2011: Living in a Digital World 40
Figure 5-35 Chapter 5

41.
Scanners and Reading Devices
• Data collection devices
obtain data directly at
the location where the
transaction or event
takes place
• Used in:
– Restaurants
– Grocery stores
– Factories
– Warehouses
– The outdoors
Page 282 Discovering Computers 2011: Living in a Digital World 41
Figure 5-36 Chapter 5

42.
Biometric Input
• Biometrics authenticates a person’s identity by
verifying a personal characteristic
Face Hand
Fingerprint
recognition geometry
reader
system system
Voice Signature
Iris recognition
verification verification
system
system system
Retinal
scanners
Pages 282 - 283 Discovering Computers 2011: Living in a Digital World 42
Chapter 5

43.
Biometric Input
hand
geometry
system
iris
recognition
system
fingerprint
Click to view Web Link,
reader
click Chapter 5, Click Web
Link from left navigation,
then click Biometric Input
below Chapter 5
Pages 282 – 283 Discovering Computers 2011: Living in a Digital World 43
Figures 5-37 – 5-39 Chapter 5

44.
Terminals
• A terminal is a computer that allows users to send data to
and/or receive information from a host computer
A POS terminal An automated A DVD kiosk is a
records purchases, teller machine self-service DVD
processes (ATM) allows users rental machine
payment, and to access their
updates inventory bank accounts
Pages 284 – 285 Discovering Computers 2011: Living in a Digital World 44
Figures 5-40 – 5-42 Chapter 5

45.
Putting It All Together
Page 285 Discovering Computers 2011: Living in a Digital World 45
Figure 5-43 Chapter 5

46.
Putting It All Together
Page 285 Discovering Computers 2011: Living in a Digital World 46
Figure 5-43 Chapter 5

47.
Putting It All Together
Page 285 Discovering Computers 2011: Living in a Digital World 47
Figure 5-43 Chapter 5

48.
Input Devices for Physically Challenged Users
• Several input devices are available to assist
physically challenged users:
Keyboards
On-screen
Keyguard with larger
keyboard
keys
Various Head-
Gesture
pointing mounted
recognition
devices pointer
Computerized
Click to view Web Link,
click Chapter 5, Click Web
implant
Link from left navigation,
then click Gesture Recognition
devices
below Chapter 5
Page 286 Discovering Computers 2011: Living in a Digital World 48
Chapter 5

49.
Input Devices for Physically Challenged Users
Keyboard with larger keys Head-mounted pointer
Page 286 Discovering Computers 2011: Living in a Digital World 49
Figures 5-44 – 5-45 Chapter 5

50.
Summary
Various techniques of entering Several commonly used input
input devices
Keyboard, mouse, and other
pointing devices; touch screens,
pen input, other input for smart
Input devices for physically
phones, game controllers, digital
challenged users
cameras, voice input, video input,
scanners and reading devices,
biometric input, and terminals
Page 287 Discovering Computers 2011: Living in a Digital World 50
Chapter 5

51.
Discovering
Computers 2011
Living in a Digital World
Chapter 5 Complete