discovering computer
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Living in a Digital World
DiscoveringComputers 2011
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Objectives Overview
Explain why computerliteracy is vital to
success in todays world
Define the term,computer, and describe
the relationshipbetween data and
information
Describe the fivecomponents of a
computer
Discuss the advantagesand disadvantages thatusers experience when
working withcomputers
Define the term,
network, and identifybenefits of sharingresources on a network
Discuss the uses of theInternet and World
Wide Web
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Objectives Overview
Distinguish between systemsoftware and application
software
Differentiate among types,sizes, and functions of
computers in each category
Describe the role of eachelement in an information
system
Explain how home users,small office/home office
users, mobile users, powerusers, and enterprise userseach interact with
computers
Discuss how society usescomputers in education,
finance, government, healthcare, science, publishing,travel, and manufacturing
Discovering Computers 2011: Living in a Digital WorldChapter 1
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A World of Computers
Computers are everywhere
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What Is a Computer?
A computer is an electronic device, operatingunder the control of instructions stored in its ownmemory
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Collectsdata
(input)Processing
Producesinformation
(output)
Information Processing Cycle
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What Is a Computer?
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The Components of a Computer
A computer contains many electric, electronic, andmechanical components known as hardware
Discovering Computers 2011: Living in a Digital WorldChapter 1
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Allows you to enter data and instructions into a computerInput Device
Hardware component that conveys information to one or more peopleOutput Device
Case that contains the electronic components of the computer thatare used to process dataSystem Unit
Holds data, instructions, and information for future useStorage Device
Enables a computer to send and receive data, instructions, andinformation to and from one or more computers or mobile devices
CommunicationsDevice
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The Components of a Computer
Discovering Computers 2011: Living in a Digital WorldChapter 1
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Advantages and Disadvantagesof Using Computers
Advantages ofUsing Computers
Disadvantages ofUsing Computers
Discovering Computers 2011: Living in a Digital WorldChapter 1 9
Speed
Reliability
Consistency
Storage
Communications
Health Risks
Violation of Privacy
Public Safety
Impact on Labor Force
Impact on Environment
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Advantages and Disadvantagesof Using Computers
Green computing involves reducing the electricityconsumed and environmental waste generated whenusing a computer
Strategies include: Recycling Regulating manufacturing processes Extending the life of computers
Immediately donating or properly disposing of replaced computers
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Networks and the Internet
A network is acollection of computersand devices connected
together, oftenwirelessly, viacommunicationsdevices and
transmission media
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Pages 10 - 11Figure 1-6
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Networks and the Internet
The Internet is a worldwide collection of networks thatconnects millions of businesses, government agencies,educational institutions, and individuals
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What do people do on the Internet?
Lets compile a list of our own.
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Networks and the Internet
People use the Internet for a variety of reasons:
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Communicate Research andAccess Information
Shop Bank and Invest Online Trading
Entertainment Download Videos Share Information Web Application
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Networks and the Internet
A social networking Web site encouragesmembers to share their interests, ideas, stories,photos, music, and videos with other registeredusers
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Computer Software
Software , also called a program or applications(Apps) , tells the computer what tasks to performand how to perform them
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Operating system Utility program
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Computer Software
Installing is the process of setting up software towork with the computer, printer, and otherhardware
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Computer Software
A programmer developssoftware or writes theinstructions that directthe computer to processdata into information
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Categories of Computers
Embedded computers
Supercomputers
Mainframes
Servers
Game consoles
Mobile computers and mobile devices
Personal computers
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Personal Computers
A personal computer can perform all of its input,processing, output, and storage activities by itself
Two popular architectures are the PC and theApple
Desktop computer
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Mobile Computers and Mobile Devices
Personal computer youcan carry from place toplace
Examples includenotebook computers ,laptop computers ,netbooks, ultra-thins ,and Tablet PCs
MobileComputer
Computing devicesmall enough to hold inyour hand
Examples include
smart phones , PDAs,handheld computers ,portable mediaplayers , and digitalcameras
MobileDevice
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Mobile Computers and Mobile Devices
PDA
Handheld
Computer
PortableMedia Player
Digital Camera
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Notebook
Tablet PC
SmartPhones
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Game Consoles
A game console is amobile computingdevice designed for
single-player ormultiplayer videogames
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Servers
A server controls accessto the hardware,software, and other
resources on a network Provides a centralized
storage area forprograms, data, and
information Server Types: File, Web,
Print, DHCP, DNS
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Mainframes
A mainframe is a large,expensive, powerfulcomputer that can
handle hundreds orthousands of connectedusers simultaneously
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Supercomputers
A supercomputer is the fastest, most powerfulcomputer
Fastest supercomputers are capable of processingmore than one quadrillion instructions in a singlesecond
Owned by corporation
Government gencies Rent computer time Parallel Processing
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Embedded Computers
An embedded computer is a special-purposecomputer that functions as a component in alarger product
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ConsumerElectronics
Mobile and digitaltelephones
Digital televisions Cameras Video recorders DVD players and
recorders Answering
machines
Home AutomationDevices
Thermostats Sprinkling systems Security
monitoring systems Appliances Lights
Automobiles
Antilock brakes Engine control
modules Airbag controller Cruise control
Process Controllersand Robotics
Remote monitoringsystems
Power monitors Machine
controllers Medical devices
Computer Devicesand Office Machines
Keyboards Printers Faxes Copiers
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Embedded Computers
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Elements of an Information System
Hardware Software Data
People Procedures
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Examples of Computer Usage
Home User Personal financial management Web access Communications Entertainment
Small Office/HomeOffice User Look up information Send and receive e-mail
messages Make telephone calls
Mobile User Connect to other computers on
a network or the Internet Transfer information Play video games Listen to music Watch movies
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Examples of Computer Usage
Power User Work with multimedia Use industry-specific
software
Enterprise User Communicate among
employees Process high volumes
of transactions Blog
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Computer Applications in Society
Education
Finance
Government
Health CareDiscovering Computers 2011: Living in a Digital World
Chapter 132Pages 34 - 36
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Computer Applications in Society
Science
Publishing
Travel
ManufacturingDiscovering Computers 2011: Living in a Digital World
Chapter 133Pages 36 - 38
Figures 1-40 1-43
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Summary
Basic computerconcepts
Components of acomputer
Networks, the Internet,and computer software
Many different
categories ofcomputers, computerusers, and computer
applications in society
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Living in a Digital World
DiscoveringComputers 2011
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