Discovering
Computers
Fundamentals
Fifth Edition
Chapter 5
Input and
Output
Chapter 5 Objectives
List the characteristics
of a keyboard
Summarize how
these pointing devices
work: mouse, trackball, touchpad,
pointing stick, light pen, touch
screen, stylus, digital pen, and
gaming and media player
controllers
Describe other types of input,
including voice input; input devices
for smart phones, PDAs, and Tablet
PCs; digital cameras; video input;
scanners and reading devices;
terminals; and biometric input
Describe the characteristics of LCD
monitors, LCD screens, and CRT
monitors
Summarize the various types of printers
Explain the characteristics of speakers,
headphones, and earphones; fax
machines and fax modems,
multifunction peripherals; data
projectors; and interactive whiteboards
Identify input and output options for
physically challenged users
Next
What Is Input
What is input?

Data or instructions entered into the memory of
computer

Input device is any hardware component that
allows users to enter data and instructions
p. 166 Fig. 5-1
Next
Keyboard and Pointing Devices
What is a keyboard?

Input device that contains
keys users press to enter
data into a computer

Includes typing area,
numeric keypad, and
function keys
Can be cordless or
built-in

p. 168 Fig. 5-2
Next
Keyboard and Pointing Devices
What is a mouse?
 Pointing device that fits under the palm of your hand

Pointing device controls
movement of pointer
 Mechanical mouse
 Optical mouse
 Laser mouse
 Air mouse
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Air Mouse
below Chapter 5
p. 169 Fig. 5-3
Next
Keyboard and Pointing Devices
What is a trackball?


Stationary pointing device
with a ball on its top or side
To move pointer, rotate ball
with thumb, fingers, or palm
of hand
p. 170 Fig. 5-4
Next
Keyboard and Pointing Devices
What are a touchpad and a
pointing stick?


Touchpad is small, flat,
rectangular pointing device
sensitive to pressure and motion
Pointing stick is pointing device
shaped like pencil eraser
positioned between keys on
keyboard
p. 170 Figs. 5-5—5-6
Next
Keyboard and Pointing Devices
What is a light pen?
 Handheld input device that can detect the
presence of light

p. 170
Press light pen against screen surface and then press
button on pen
Next
Keyboard and Pointing Devices
What is a touch screen?



Touch areas of screen with
finger
Often used with kiosks
Microsoft Surface is a
30-inch tabletop display
that allows one or more
people to interact with
the screen using their
fingers or hands
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Microsoft Surface
below Chapter 5
p. 170 - 171 Fig. 5-7 and 5-8
Next
Keyboard and Pointing Devices
What is a digital pen?


Looks like a ballpoint pen, but uses pressure to write
text and draw lines
Used with graphics tablets, flat electronic boards
p. 171 Fig. 5-9
Next
Gaming and Media Player Controllers
What are the types of game controllers?





Gamepads
Joysticks and
Wheels
Light gun
Dance pad
Motion-sensing
game controller
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Wii Remote
below Chapter 5
p. 172 Fig. 5-10
Next
Gaming and Media Player Controllers
What is a touch-sensitive pad?

Input device on a portable
media player that enables
users to scroll through
and play music, view
pictures, watch videos or
movies, adjust volume,
and customize settings
 Click Wheel
p. 172 Fig. 5-11
Next
Other Types of Input
What is voice input?
 Entering input by speaking into a microphone
 Voice recognition or speech recognition is the
computer’s capability to distinguish spoken words
p. 173
Next
Other Types of Input
What is audio input?
 Entering sounds into a computer - speech,
music, and sound effects
 MIDI - standard defining how digital musical
devices represent sound electronically
p. 173 Fig. 5-12
Next
Other Types of Input
How is data
entered into a
smart phone?
p. 174 Fig. 5-13
Next
Other Types of Input
What is a Tablet PC?


Mobile computer
Primary input device is a
pressure-sensitive digital
pen
p. 174 -175 Fig. 5-15
Next
Other Types of Input
What is a digital camera?


Allows you to take
digital pictures
Images viewable
immediately on
camera


p. 175 Fig. 5-16
Download to
computer
Post pictures
to Web
Next
Other Types of Input
What is resolution?



Number of horizontal and vertical pixels in a
display device
Resolutions range from 4 million to more than 16
million pixels (MP)
Pixel (picture element) is smallest element in
electronic image

p. 176
Greater the number of pixels, the better the image
quality
Next
Other Types of Input
What is video input?


p. 176
Process of capturing full-motion images and
storing them on a computer’s storage medium
Digital video (DV) camera records video as
digital signals
Next
Other Types of Input
What is a Web cam?
 Web cam is used to capture video and still images, send
e-mail messages with video attachments, add live
images to instant messages, broadcast live images over
the Internet, and to make video telephone calls on
Internet
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Web Cams
below Chapter 5
p. 176 Fig. 5-17
Next
Other Types of Input
Video: Video Editing on Your Computer
CLICK TO START
Next
Other Types of Input
What is video conferencing?

Two or more geographically separated people
who use a network or the Internet to transmit
audio and video data
p. 176 Fig. 5-18
Next
Other Types of Input
What is a scanner?

Light-sensing device that reads
printed text and graphics

p. 177 Fig. 5-19
Used for image processing,
converting paper documents
into electronic images
Next
Other Types of Input
What is a turnaround document?

Document that you
return to the company
that sent it

p. 177 Fig. 5-20
Portion you return has
information printed in
OCR characters
Next
Other Types of Input
What is an optical reader?

Device that uses light source to read characters, marks,
and codes and then converts them into digital data



Optical character recognition
(OCR) reads typewritten
characters
Optical mark recognition
(OMR) reads hand-drawn
pencil marks, such as small
circles
Bar code reader
p. 177 - 178 Fig. 5-21
Next
Other Types of Input
What is an RFID reader?

Reads information on
the tag via radio waves

p. 178 Fig. 5-22
Can be handheld
devices or mounted in a
stationary object
Next
Other Types of Input
What is a magnetic stripe card reader?


Reads the magnetic
stripe on the back of a
credit card
Exposure to a magnetic
field can erase the
contents of a card’s
magnetic stripe
p. 179 Fig. 5-23
Next
Other Types of Input
What is a magnetic-ink character recognition
(MICR) reader?


p. 179 Fig. 5-24
Can read text printed with magnetized ink
Banking industry almost exclusively uses MICR
for check processing
Next
Other Types of Input
What is a point of sale (POS) terminal?


Records purchases,
processes credit or
debit cards, and
updates inventory
Fingerprint can be
linked to a payment
method
p. 180 - 181 Fig. 5-25
Next
Other Types of Input
What is an automated teller machine (ATM)?

Self-service banking machine that connects to a host
computer through a network
p. 180 Fig. 5-26
Next
Other Types of Input
What is biometrics?

Authenticates person’s identity
by verifying a personal
characteristic

Fingerprint reader captures curves
and indentations of a fingerprint
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Biometric Input
below Chapter 5
p. 181 Fig. 5-27
Next
Other Types of Input
What are examples of biometric technology?



Voice verification system compares live
speech with stored voice pattern
Signature verification system recognizes
shape of signature
Iris recognition system reads
patterns in blood vessels in back
of retina

p. 181 Fig. 5-28
Biometric data is sometimes stored
on smart card, which stores
personal data on microprocessor
embedded in card
Next
What is Output
What is output?

Data that has been processed into a useful form

p. 182 Fig. 5-29
Output device is any hardware component that can convey
information to one or more people
Next
Display Devices
What is a display device?

Output device that visually conveys text, graphics,
and video information


Typically used with desktop computers
Monitor houses display device as separate peripheral
p. 183 - 184 Fig. 5-31
Next
Display Devices
What is an LCD monitor?



Uses liquid crystal display
Have a small footprint
Mobile devices that contain
LCD displays include

Notebook computer, Tablet
PC, ultra personal
computer, portable media
player, smart phone, and
PDA
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Widescreen LCD
Monitors below Chapter 5
p. 184 -185 Fig. 5-30
Next
Display Devices
Video: SID: Size Matters
CLICK TO START
Next
Display Devices
What is a plasma monitor?

Uses gas plasma technology

p. 185 Fig. 5-32
Larger screen size and richer colors than LCD, but are more
expensive
Next
Display Devices
What is a CRT monitor?


Contains cathode-ray
tube (CRT)
Common sizes are 15, 17,
19, 21, and 22 inches

p. 186 Fig. 5-33
Viewable size is diagonal
measurement of actual
viewing area
Next
Display Devices
What is the ENERGY STAR program?


p. 186
Encourages manufacturers to create energy-efficient
devices that require little power when not in use
Monitors and devices meeting guidelines display
ENERGY STAR label
Next
Printers
What is a printer?


Output device that produces text and graphics on a
physical medium
Purchasing a printer
p. 187 Fig. 5-34
Next
Printers
What are the various ways to print documents and
pictures?
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Printing Wirelessly
below Chapter 5
p. 188 Fig. 5-35
Next
Printers
What is a nonimpact printer?

Forms characters and graphics without striking paper
 Ink-jet printer sprays tiny drops of liquid ink
onto paper
 Prints in black-and-white or color on a variety
of paper types
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Ink-Jet Printers
below Chapter 5
p. 189 - 190 Fig. 5-36
Next
Printers
What is a photo printer?



Color printer that produces photo-lab-quality pictures
Many photo printers have a built-in card slot
PictBridge is a standard technology that allows you to
print pictures directly from a digital camera
p. 190 Fig. 5-37
Next
Printers
What is a laser printer?



High-speed, high-quality
nonimpact printer
Prints text and graphics in
high-quality resolution,
ranging from 1200 to 2400
dpi
Typically costs more than
ink-jet printer, but is much
faster
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Laser Printers
below Chapter 5
p. 190 - 191 Fig. 5-38
Next
Printers
What is a thermal printer?

Generates images by
pushing electrically heated
pins against heat-sensitive
paper

p. 191 Fig. 5-39
Dye-sublimation printer,
(also called a digital photo
printer) uses heat to
transfer dye to specially
coated paper
Next
Printers
What is a mobile printer?

Small, lightweight, battery-powered printer that allows
mobile user to print from notebook computer, Tablet
PC, or smart phone or other personal mobile device
while traveling
p. 192 Fig. 5-40
Next
Printers
What is a plotter?


Sophisticated printer used to produce high-quality
drawings
Large-format printer creates photo-realistic-quality
color prints
p. 192 Fig. 5-41
Next
Printers
What is an impact printer?

Forms characters by striking mechanism against inked ribbon
that contacts paper
 Dot-matrix printer produces
printed images when tiny
wire pins strike ribbon
 Line printer prints entire line
at a time
p. 192 - 193 Fig. 5-42
Next
Other Output Devices
What is an audio output device?


Computer component that produces music, speech, or
other sounds
Speakers, earphones, and earbuds are common devices
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Earphones
below Chapter 5
p. 193 - 194 Fig. 5-43
Next
Other Output Devices
What is a facsimile (fax) machine?

Device that transmits and receives documents over
telephone lines
What is a fax modem?

p. 194
Modem that allows you to send and receive electronic
documents as faxes
Next
Other Output Devices
What is a multifunction peripheral?

Provides functionality
of a printer, scanner,
copy machine, and
fax machine
p. 194 Fig. 5-45
Next
Other Output Devices
What is a data projector?

Device that takes the text and image from
computer screen and projects it onto larger
screen
p. 195 Fig. 5-46
Next
Other Output Devices
What is an interactive whiteboard?

Touch-sensitive device that displays the image
on a connected computer screen
p. 195 Fig. 5-47
Next
Putting It All Together
What are suggested input and output devices for the home user?
Home User
Input Device
• Enhanced keyboard or
ergonomic keyboard
• Mouse
• Stylus for smart phone
or other personal mobile
device
• Game controller
• Color scanner
• 4-megapixel digital
camera
• Headphones that
include a microphone
•Web cam
•Fingerprint reader
p. 196 Fig. 5-48
Output Device
• 17- or 19-inch color LCD
monitor, or 17-inch LCD
screen on notebook
computer
• Ink-jet color printer; or
• Photo printer
• Speakers
• Headphones or
earphones
Next
Putting It All Together
What are suggested input and output devices for the small
office/home office user?
SOHO User
Input Device
• Enhanced keyboard or
ergonomic keyboard
• Mouse
• Stylus and portable
keyboard for smart phone
or other personal mobile
device, or digital pen for
Tablet PC
• Color scanner
• 5-megapixel digital
camera
• Headphones that
include a microphone
• Web cam
p. 196 Fig. 5-48
Output Device
• 19- or 22-inch LCD
monitor
•LCD screen on Tablet
PC, smart phone, or other
personal mobile device
• Multifunction peripheral;
or
• Ink-jet color printer; or
• Laser printer (black-andwhite or color)
• Fax machine
• Speakers
Next
Putting It All Together
What are suggested input and output devices for the mobile user?
Mobile User
Input Device
• Wireless mouse for
notebook computer
• Touchpad or pointing stick
on notebook computer
• Stylus and portable
keyboard for smart phone or
other personal mobile
device, or digital pen for
Tablet PC
• 4- or 5- megapixel digital
camera
• Headphones that include a
microphone
• Fingerprint reader for
notebook computer
p. 196 Fig. 5-48
Output Device
• 17-inch LCD screen on
notebook computer
•LCD screen on smart phone
or other personal mobile
device
• Mobile color printer
• Ink-jet color printer; or
• Laser printer, for in-office
use (black-and-white or
color)
• Photo printer
• Fax modem
• Headphones or earphones
• Data projector
Next
Putting It All Together
What are suggested input and output devices for the power user?
Power User
Input Device
• Enhanced keyboard or
ergonomic keyboard
• Mouse
• Stylus and portable
keyboard for smart phone
or other personal media
device
• Pen for graphics tablet
• Color scanner
• 6- to 12-megapixel
digital camera
• Headphones that
include a microphone
•Web cam
p. 196 Fig. 5-48
Output Device
• 27-inch LCD monitor
• Laser printer (black-andwhite or color)
• Plotter or large-format
printer; or
• Photo printer; or
• Dye-sublimation printer
• Fax machine or fax
modem
• Speakers
• Headphones or
earphones
Next
Putting It All Together
What are suggested input and output devices for the large business user?
Large
Business User
Input Device
• Enhanced keyboard or
ergonomic keyboard
• Mouse
• Stylus and portable keyboard
for smart phone or other personal
mobile device, or digital pen for
Tablet PC
• Touch screen
• Light pen
• Color scanner
• 6- to 12- megapixel digital
camera
• OCR/OMR readers, bar code
readers, or MICR reader
• Microphone
• Video camera for video
conferences
• Fingerprint reader or other
biometric device
p. 196 Fig. 5-48
Output Device
• 19- or 22-inch LCD monitor
•LCD screen on Tablet PC,
smart phone, or other
personal mobile device
• High-speed laser printer
• Laser printer, color
• Line printer (for large
reports from a mainframe)
• Fax machine or fax modem
• Speakers
• Headphones or earphones
• Data projector
• Interactive whiteboard
Next
Input and Output Devices for Physically Challenged
Users
What input devices are available
for those with physical limitations?


Keyboards with larger keys
Head-mounted pointer controls
pointer on screen
p. 197 Fig. 5-49
Next
Input and Output Devices for Physically Challenged
Users
What other output options are available for visually
impaired users?



Change Windows Vista
settings, such as increasing size
or changing color of text to
make words easier to read
Blind users can work with
voice output
Braille printer outputs
information in Braille
onto paper
p. 197 Fig. 5-50
Next
Summary of Input and Output
Data and instructions
Processing and organizing
input into output
Various techniques of input
Various methods of output
Commonly used input devices
Commonly used output devices
Chapter 5 Complete