Discovering Computers
Fundamentals,
2011 Edition
Living in a Digital World
Objectives Overview
Explain various
types of input
Explain various
types of output
Identify input and
output options for
physically
challenged users
See Page 187
for Detailed Objectives
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
2
What Is Input?
• Input is any data and instructions entered into the
memory of a computer
Pages 188– 189
Figure 5-1
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
3
What Is Input?
An input device
is any hardware
component that
allows users to
enter data and
instructions into
a computer
Page 188
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
4
Keyboard and Pointing Devices
Page 189
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
5
Keyboard and Pointing Devices
• A keyboard is an input device that contains keys
users press to enter data and instructions into a
computer
Page 190
Figure 5-2
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
6
Keyboard and Pointing Devices
• 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 190
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
7
Keyboard and Pointing Devices
• 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
Page 191
Figure 5-3
Discovering Computers Fundamentals, 2011 Edition
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Keyboard and Pointing Devices
• 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 191 – 192
Figure 5-4
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
9
Page 192
Figures 5-5 – 5-7
• A touchpad is
a small, flat,
rectangular
pointing
device that is
sensitive to
pressure and
motion
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
Pointing Stick
• A trackball is a
stationary
pointing
device with a
ball on its top
or side
Touchpad
Trackball
Keyboard and Pointing Devices
• A pointing
stick is a
pressuresensitive
pointing
device shaped
like a pencil
eraser that is
positioned
between keys
on a keyboard
10
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 193
Figure 5-8
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
11
Touch Screens and Touch-Sensitive Pads
Microsoft Surface
Page 193
Figures 5-9 – 5-10
Touch-sensitive pads
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
12
Pen Input
• With pen input, you touch a stylus or digital pen on a flat
surface to write, draw, or make selections
Page 194
Figure 5-11
Discovering Computers Fundamentals, 2011 Edition
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13
Other Types of Input
Page 195
Figure 5-12
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
14
Other Types of Input
• Video games and computer games use a game controller
as the input device that directs movements and actions
of on-screen objects
Gamepads
Joysticks and
Wheels
Light guns
Motionsensing
controllers
Wii Remote
Dance pads
Click to view Web Link,
click Chapter 5, Click Web
Link from left navigation,
then click Game Controllers
below Chapter 5
Pages 196 - 197
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
15
Other Types of Input
Page 196
Figure 5-13
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
16
Other Types of Input
• A digital camera is a mobile device that allows
users to take pictures and store them digitally
Studio cameras - stationary
Field cameras – portable
Point-and-shoot camera
Page 197
Discovering Computers Fundamentals, 2011 Edition
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17
Other Types of Input
• Main factor affecting the quality of digital camera photos:
Resolution
Page 198
• Resolution is the number
of horizontal and vertical
pixels in a display device
• A pixel is the smallest
element in an electronic
display
• Each pixel stores a
number of bits of data
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
18
Other Types of 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
• Audio input is the process of entering any sound
into the computer
Page 198
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
19
Other Types of Input
• Music production software allows users to record,
compose, mix, and edit music and sounds
Page 198
Figure 5-15
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
20
Other Types of 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 199
Discovering Computers Fundamentals, 2011 Edition
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21
Other Types of Input
• A Web cam is a type of digital video camera that
enables a user to:
Capture video and
still images
Send e-mail
messages with
video attachments
Broadcast live
images over the
Internet
Page 199
Add live images to
instant messages
Make video
telephone calls
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
22
Other Types of Input
• A video conference is a meeting between two or
more geographically separated people
Page 199
Figures 5-16 – 5-17
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
23
Other Types of Input
• A flatbed scanner creates a file of the document
in memory
– Works in a manner similar to a copy machine
Page 200
Figure 5-18
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
24
Other Types of Input
• 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 200
Figure 5-19
Discovering Computers Fundamentals, 2011 Edition
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25
Other Types of Input
• Optical mark recognition (OMR) reads hand-drawn
marks such as small circles or rectangles
Page 200
Discovering Computers Fundamentals, 2011 Edition
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26
Other Types of Input
• A bar code reader, also
called a bar code
scanner uses laser
beams to read bar
codes
Page 201
Figure 5-20
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
27
Other Types of Input
• 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
runners in a
marathon
Tracking location
of soldiers
Managing
inventory
Page 201
Employee
wardrobes
Gauging pressure
and temperature
of tires
Airline baggage
Checking out
library books
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
Checking lift
tickets of skiers
Tracking toll
payments
28
Other Types of Input
• Magnetic stripe card readers read the magnetic
stripe on the back of cards such as:
Credit cards
Entertainment cards
Bank cards
Other similar cards
Pages 201
Figure 5-22
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
29
Other Types of Input
• 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 202
Figure 5-23
Discovering Computers Fundamentals, 2011 Edition
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Other Types of Input
• Biometrics authenticates a person’s identity by
verifying a personal characteristic
Fingerprint
reader
Face
recognition
system
Signature
verification
system
Pages 202 - 203
Hand
geometry
system
Iris recognition
system
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
Voice
verification
system
Retinal
scanners
31
Other Types of Input
iris
recognition
system
Click to view Web Link,
click Chapter 5, Click Web
Link from left navigation,
then click Biometric Input
below Chapter 5
Pages 202 – 203
Figures 5-24 – 5-25
fingerprint
reader
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
32
Other Types of Input
• A terminal is a computer that allows users to send data
to and/or receive information from a host computer
A POS terminal
records purchases,
processes
payment, and
updates inventory
Pages 204 – 205
Figures 5-26 – 5-28
An automated
teller machine
(ATM) allows users
to access their
bank accounts
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
A DVD kiosk is a
self-service DVD
rental machine
33
What Is Output?
• Output is data that has been processed into a
useful form
Pages 206 – 207
Figure 5-29
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
34
What Is Output?
• An output device is any type of hardware
component that conveys information to one or
more people
Display
devices
Printers
Data
projectors
Page 206
Speakers,
headphones,
and earbuds
Interactive
whiteboards
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
35
Display Devices
• A display device visually
conveys text, graphics,
and video information
• A monitor is packaged
as a separate peripheral
– LCD monitor
– Widescreen
Click to view Web Link,
click Chapter 5, Click Web
Link from left navigation,
then click Widescreen LCD
Monitors below Chapter 5
Pages 207 – 208
Figure 5-30
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
36
Display Devices
• Plasma monitors are display devices that use gas
plasma technology and offer screen sizes up to
150 inches
Page 210
Figure 5-32
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
37
Display Devices
• A CRT monitor is a desktop monitor that contains
a cathode-ray tube
Page 210
Figure 5-33
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
38
Printers
• A printer
produces text
and graphics on
a physical
medium
• Before
purchasing a
printer, ask
yourself a series
of questions
Page 211
Figure 5-34
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
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Printers
Page 212
Figure 5-35
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
40
Printers
• A multifunction peripheral (MFP) is a single
device that prints, scans, copies, and in some
cases, faxes
– Sometimes called an all-in-one device
Page 215
Figure 5-39
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
41
Printers
• A mobile printer is a
small, lightweight,
battery-powered printer
that allows a mobile
user to print from a
mobile device
Page 216
Figure 5-41
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
42
Other Output Devices
• An audio output device produces music, speech,
or other sounds
Most computer users attach
speakers to their computers to:
• Generate higher-quality sounds for playing
games
• Interact with multimedia presentations
• Listen to music
• View movies
Page 217
Figure 5-44
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
43
Other Output Devices
• Headphones are
speakers that cover or
are placed outside of
the ear
• Earbuds (also called
earphones) rest inside
the ear canal
Click to view Web Link,
click Chapter 5, Click Web
Link from left navigation,
then click Earbuds
below Chapter 5
Page 218
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
44
Other Output Devices
Voice output occurs when you hear a
person’s voice or when the computer
talks to you through the speakers
• Some Web sites dedicate themselves to
providing voice output
• Often works with voice input
• VoIP uses voice output and voice input
Page 218
Discovering Computers Fundamentals, 2011 Edition
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45
Other Output Devices
• A data projector is a
device that takes the
text and images
displaying on a
computer screen and
projects them on a
larger screen
Page 218
Figure 5-45
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
46
Input and Output Devices
for Physically Challenged Users
Head-mounted pointer
Pages 220 – 221
Figures 5-48 – 5-49
Braille printer
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
47
Summary
Various techniques for
entering input and
several commonly
used input device
Page 222
Various methods of
output and several
commonly used
output devices
Discovering Computers Fundamentals, 2011 Edition
Chapter 5
48