MIS402-Computer Concepts & Applications
Lecture # 4
Ms. Noor-ul-Huda
Lecturer
Department of Computer Science
College of Computer Science and Information Systems
noor.huda@iobm.edu.pk
Discovering Computers
Technology in a World of Computers,
Mobile Devices, and the Internet
Chapter 3
Computers and
Mobile Devices
Objectives Overview
Describe the characteristics and uses of desktops, laptops, tablets, and
handheld computers
Describe the characteristics and types of servers
Differentiate among POS terminals, ATMs, and self-service kiosks
Describe cloud computing and identify its uses
Describe the characteristics and uses of smartphones, digital cameras,
portable media players, and e-book readers
See Page 104 3
Discovering Computers 2014: Chapter 3
for Detailed Objectives
Objectives Overview
Describe the characteristics of and ways to interact with game devices
Identify uses of embedded computers
Differentiate a port from a connector, identify various ports and connectors,
and differentiate among Bluetooth, Wi-Fi, and NFC wireless device connections
Identify safeguards against hardware theft and vandalism and hardware failure
Discuss ways to prevent health-related injuries and disorders caused from
technology use, and describe ways to design a workplace ergonomically
See Page 104 4
Discovering Computers 2014: Chapter 3
for Detailed Objectives
Computers and Mobile Devices
• Types of computers include:
Smartphones, digital
Desktop and mobile Servers and cameras, e-book
computers terminals readers and portable
media players
Embedded
Game devices
computers
Page 104 Discovering Computers 2014: Chapter 3 5
Desktops and Mobile Computers
• A personal computer (PC) is a computer that can
perform all of its input, processing, output, and
storage activities by itself and is intended to be
used by one person at a time
• A mobile computer is a portable personal
computer, designed so that a user easily can carry
it from place to place
Page 104 Discovering Computers 2014: Chapter 3 6
Desktops and Mobile Computers
Page 105 Discovering Computers 2014: Chapter 3 7
Figure 3-1
Desktops and Mobile Computers
• A desktop, or desktop computer, is a personal
computer designed to be in a stationary location,
where all of its components fit on or under a desk
or table
Pages 106 – 107 Discovering Computers 2014: Chapter 3 8
Figure 3-3
Desktops and Mobile Computers
• A laptop, also called a notebook computer, is a
thin, lightweight mobile computer with a screen
in its lid and a keyboard in its base
Page 108 Discovering Computers 2014: Chapter 3 9
Figure 3-4
Desktops and Mobile Computers
• A tablet is a thin, lightweight mobile computer
that has a touch screen
Page 109 Discovering Computers 2014: Chapter 3 10
Figure 3-5
Desktops and Mobile Computers
• A handheld computer is a computer small enough
to fit in one hand
Page 111 Discovering Computers 2014: Chapter 3 11
Figure 3-7
Servers
• A server is a computer dedicated to providing one
or more services to other computers or devices
on a network
– Rack server
– Blade server
– Tower server
Pages 111 – 112 Discovering Computers 2014: Chapter 3 12
Figure 3-8
Servers
Page 111 Discovering Computers 2014: Chapter 3 13
Table 3-1
Servers
• A mainframe is a large, expensive, powerful server
that can handle hundreds or thousands of
connected users simultaneously
Pages 112 – 113 Discovering Computers 2014: Chapter 3 14
Figure 3-9
Supercomputers
• A supercomputer is the fastest, most powerful
computer — and the most expensive
Page 113 Discovering Computers 2014: Chapter 3 15
Figure 3-10
Terminals
• A terminal is a computer, usually with limited processing
power, that enables users to send data to and/or receive
information from a server, or host computer
• A thin client is a terminal that looks like a desktop but
has limited capabilities and components
• Most retail stores use a POS terminal to record
purchases, process credit or debit cards, and update
inventory
Page 113 Discovering Computers 2014: Chapter 3 16
Figure 3-11
Terminals
• An ATM (automated teller machine) is a self-
service banking terminal that connects to a host
computer through a network
Page 114 Discovering Computers 2014: Chapter 3 17
Figure 3-12
Terminals
• A self-service kiosk is a freestanding terminal that
usually has a touch screen for user interaction
Page 115 Discovering Computers 2014: Chapter 3 18
Table 3-2
Cloud Computing
• Cloud computing refers to an environment of
servers that house and provide access to
resources users access through the Internet
Page 116 Discovering Computers 2014: Chapter 3 19
Figure 3-14
Mobile Devices
• A smartphone is an Internet-capable phone that
usually also includes a calendar, an appointment
book, an address book, a calculator, a notepad,
games, browser, and numerous other apps
• Many smartphones have touch screens. Instead of
or in addition to a touch screen, some have a
built-in mini keyboard on the front of the phone
or a keyboard that slides in and out from behind
the phone
Page 117 Discovering Computers 2014: Chapter 3 20
Mobile Devices
Page 118 Discovering Computers 2014: Chapter 3 21
Figure 3-15
Mobile Devices
• A digital camera is a mobile device that allows
users to take photos and store the photographed
images digitally
Page 120 Discovering Computers 2014: Chapter 3 22
Figure 3-16
Mobile Devices
Page 121 Discovering Computers 2014: Chapter 3 23
Figure 3-17
Mobile Devices
• A portable media player, sometimes called a
personal media player, is a mobile device on
which you can store, organize, and play or view
digital media
Page 122 Discovering Computers 2014: Chapter 3 24
Figure 3-19
Mobile Devices
• An e-book reader (short
for electronic book
reader), or e-reader, is a
mobile device that is
used primarily for
reading e-books and
other digital
publications
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Discovering Computers 2014: Chapter 3
Figure 3-20
Game Devices
• A game console is a mobile computing device
designed for single-player or multiplayer video
games
• A handheld game device is a small mobile device
that contains a screen, speakers, controls, and
game console all in one unit
• Game controllers include gamepads, joysticks and
wheels, dance pads, and a variety of motion-
sensing controllers
Page 125 Discovering Computers 2014: Chapter 3 26
Game Devices
Page 125 Discovering Computers 2014: Chapter 3 27
Figure 3-21
Embedded Computers
• An embedded computer is a special-purpose
computer that functions as a component in a
larger product
Home
Consumer
automation Automobiles
electronics
devices
Process Computer
controllers and devices and
robotics office machines
Pages 126 - 127 Discovering Computers 2014: Chapter 3 28
Embedded Computers
Page 127 Discovering Computers 2014: Chapter 3 29
Figure 3-22
Putting It All Together
Page 128 Discovering Computers 2014: Chapter 3 30
Table 3-3
Ports and Connections
• A port is the point at which a peripheral device attaches
to or communicates with a computer or mobile device so
that the peripheral device can send data to or receive
information from the computer or mobile device
Page 129 Discovering Computers 2014: Chapter 3 31
Figure 3-23
Ports and Connections
• A connector joins a cable to a port. A connector at
one end of a cable attaches to a port on the
computer or mobile device, and a connector at
the other end of the cable attaches to a port on
the peripheral device
Page 130 Discovering Computers 2014: Chapter 3 32
Ports and Connections
Page 130 Discovering Computers 2014: Chapter 3 33
Table 3-4
Ports and Connections
• A USB port, short for universal serial bus port, can
connect up to 127 different peripheral devices
together with a single connector
• Instead of connecting peripheral devices directly
to ports on a mobile computer, some mobile users
prefer the flexibility of port replicators and
docking stations
Page 131 Discovering Computers 2014: Chapter 3 34
Ports and Connections
Page 132 Discovering Computers 2014: Chapter 3 35
Figure 3-24
Ports and Connections
• Instead of connecting computers and mobile
devices to peripheral devices with a cable, some
peripheral devices use wireless communications
technologies
Bluetooth Wi-Fi NFC
Pages 132 - 133 Discovering Computers 2014: Chapter 3 36
Protecting Hardware
• Some schools and businesses use cables to lock
computers and help prevent theft of equipment
Page 134 Discovering Computers 2014: Chapter 3 37
Figure 3-25
Protecting Hardware
• Hardware can fail for a variety of reasons: aging
hardware; random events such as electrical power
problems; and even errors in programs or apps
– Undervoltage
– Overvoltage or power surge
Pages 134 - 135 Discovering Computers 2014: Chapter 3 38
Protecting Hardware
• A surge protector, also
called a surge
suppressor, uses
electrical components
to provide a stable
current flow and
minimize the chances of
an overvoltage reaching
the computer and other
electronic equipment
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Discovering Computers 2014: Chapter 3
Figure 3-27
Protecting Hardware
• An uninterruptible
power supply (UPS) is a
device that contains
surge protection circuits
and one or more
batteries that can
provide power during a
temporary or
permanent loss of
power
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Discovering Computers 2014: Chapter 3
Figure 3-28
Health Concerns of Using Technology
• A repetitive strain injury (RSI) is an injury or disorder of
the muscles, nerves, tendons, ligaments, and joints
• Computer vision syndrome (CVS) is a technology-
related health condition that affects eyesight
• Ergonomics is an applied science devoted to
incorporating comfort, efficiency, and safety into the
design of items in the workplace
• Technology addiction occurs when the technology
consumes someone’s entire social life
Pages 136- 138 Discovering Computers 2014: Chapter 3 41
Health Concerns of Using Technology
Page 138 Discovering Computers 2014: Chapter 3 42
Figure 3-31
Summary
Handheld computers, servers,
Characteristics of and
supercomputers, point-of-sale
purchasing guidelines for
terminals, ATMs, self-service
desktops, laptops, tablets, Ports and connections
kiosks, e-book readers, game
smartphone, digital cameras,
devices, embedded computers,
and portable media players
and cloud computing
Health concerns of using
Ways to protect hardware technology and preventative
measures
Page 139 43
Discovering Computers 2014: Chapter 3
Discovering Computers
Technology in a World of Computers,
Mobile Devices, and the Internet
Chapter 3
Computers and
Mobile Devices
Chapter 3 Complete
