Discovering computer

8/12/2019 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

Discovering Computers 2011: Living in a Digital WorldChapter 1

2See Page 3for Detailed Objectives


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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


3See Page 3for Detailed Objectives


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A World of Computers

Computers are everywhere


4Pages 4 - 5Figure 1-1


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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?


6Page 6Figure 1-2


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The Components of a Computer

A computer contains many electric, electronic, andmechanical components known as hardware


7Pages 6 - 8

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


8Page 7Figure 1-3


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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

Pages 9 - 10


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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


10Page 10

Click to view Web Link,click Chapter 1, Click WebLink from left navigation,then click Green Computingbelow Chapter 1
http://www.scsite.com/dc2011cp/ch1/weblink/


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Networks and the Internet

A network is acollection of computersand devices connected

together, oftenwirelessly, viacommunicationsdevices and

transmission media


Pages 10 - 11Figure 1-6


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The Internet is a worldwide collection of networks thatconnects millions of businesses, government agencies,educational institutions, and individuals


12Page 11Figure 1-7

Click to view Web Link,click Chapter 1, Click WebLink from left navigation,then click The Internetbelow Chapter 1


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What do people do on the Internet?

Lets compile a list of our own.


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People use the Internet for a variety of reasons:



Communicate Research andAccess Information

Shop Bank and Invest Online Trading

Entertainment Download Videos Share Information Web Application


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A social networking Web site encouragesmembers to share their interests, ideas, stories,photos, music, and videos with other registeredusers


15Page 14Figure 1-9

Click to view Web Link,click Chapter 1, Click WebLink from left navigation,then click Facebookbelow Chapter 1


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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


16Pages 15 - 16Figures 1-10 - 1-11

Operating system Utility program

Click to view Web Link,click Chapter 1, Click WebLink from left navigation,then click Windowsbelow Chapter 1


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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


Page 18Figure 1-13


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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


20Page 19Figures 1-15 - 1-16


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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


22Pages 20 - 22Figures 1-17 1-20

Click to view Web Link,click Chapter 1, Click WebLink from left navigation,then click Camera Phonebelow Chapter 1

Notebook

Tablet PC

SmartPhones


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Game Consoles

A game console is amobile computingdevice designed for

single-player ormultiplayer videogames


Page 24Figure 1-24


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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


Page 25Figure 1-25


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Mainframes

A mainframe is a large,expensive, powerfulcomputer that can

handle hundreds orthousands of connectedusers simultaneously


Page 25Figure 1-26


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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


26Page 25Figure 1-27


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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


28Page 26Figure 1-28


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Elements of an Information System

Hardware Software Data

People Procedures


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Click to view Web Link,click Chapter 1, Click WebLink from left navigation,then click Women inTechnology below Chapter 1


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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


30Pages 28 31Figures 1-30 1-32

Click to view Web Link,click Chapter 1, Click WebLink from left navigation,then click Minorities inTechnology below Chapter 1


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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


31Pages 31 32Figures 1-33 1-34

Click to view Web Link,click Chapter 1, Click WebLink from left navigation,then click EnterpriseComputing below Chapter 1


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Computer Applications in Society

Education

Finance

Government

Health CareDiscovering Computers 2011: Living in a Digital World

Chapter 132Pages 34 - 36

Figures 1-36 1-39


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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

Click to view Web Link,click Chapter 1, Click WebLink from left navigation,then click OnStarbelow Chapter 1


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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


34Page 39


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Living in a Digital World

DiscoveringComputers 2011

Ch 1 C l

Discovering computer

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