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Introduction to Computers

Feb 11, 2016

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Introduction to Computers. Objectives. Next. Recognize the importance of computer literacy. Distinguish between system software and application software. Define the term, computer. Describe the categories of computers. Identify the components of a computer. - PowerPoint PPT Presentation

Discovering Computers 2009

Introduction toComputers1CA100 Computer LiteracyObjectivesRecognize the importance of computer literacyDefine the term, computerIdentify the componentsof a computerDiscuss the advantages and disadvantages of using computersRecognize the purpose of a networkDiscuss the uses of the Internet and World Wide WebDistinguish between system software and application softwareDescribe the categories of computersIdentify the elements of an information systemDescribe the various types of computer users Discuss various computer applications in societyNext2What Is a Computer?What is the information processing cycle?p. 6 Fig. 1-2NextInputProcessOutputStorageCommunication

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The Components of a ComputerWhat is the system unit?p. 7 - 8 Fig. 1-3Next Case that containsthe electronic components of the computer that are used to process data8

The Components of a ComputerWhat is an input device?p. 7 Fig. 1-3 Hardware used to enter dataand instructionsNextClick to view Web Link,click Chapter 1, Click Web Linkfrom left navigation, then click Input Devices below Chapter 16

The Components of a ComputerWhat is an output device?

p. 7 - 8 Fig. 1-3 Hardware that conveys information to one or morepeopleNextClick to view Web Link,click Chapter 1, Click Web Linkfrom left navigation, then click Output Devices below Chapter 17The Components of a ComputerWhat are two main components on the motherboard?p. 8ProcessorAlso called a Central Processing Unit (CPU)The electronic component that interprets and carries out the basic instructions that operate the computerNextMemoryConsists of electronic components that store instructions waiting to be executed and data needed by those instructions9The Components of a ComputerWhat is storage?p. 8Storage mediaPhysical material on which data, instructions, and information are storedStorage deviceRecords and retrieves items to and from storage mediaNextHolds data, instructions, and information for future use10The Components of a ComputerWhat is a USB flash drive?

p. 8NextPortable storage device Small and lightweight enough to be transported on a keychain or in a pocketThe average USB flash drivecan hold about 2 billioncharacters

11The Components of a ComputerWhat is a hard disk?

p. 8 Fig. 1-4NextProvides greater storage capacity than a USB flash drive

Some hard disks are external:A separate free-standing unit, whereas you insert and remove a removable hard disk from the computer or a device connected to the computer.

12The Components of a ComputerWhat is a compact disc?p. 9 Fig. 1-5NextFlat, round, portable metal discCDDVD

13The Components of a ComputerWhat is a communications device?Nextp. 9Hardware component that enables a computer to send and receive data, instructions, and informationOccurs over cables, telephonelines, cellular radio networks,satellites, and other transmission mediaClick to view Web Link,click Chapter 1, Click Web Linkfrom left navigation, then click Communications Devices below Chapter 114StorageCommunicationsAdvantages and Disadvantages of Using Computersp. 10What are the advantages of using computers?Speed

ReliabilityNextConsistency15Impact onLabor ForceAdvantages and Disadvantages of Using Computersp. 10 - 11What are the disadvantages of using computers?NextViolation ofPrivacyHealth RisksPublic SafetyImpact onEnvironment16Networks and the InternetWhat is a network?p. 11NextCollection of computers and devices connected together, often wirelesslyUsed to shareResourcesHardware devicesSoftware programsDataSaves time and moneyInformation17Networks and the InternetWhat is a server?p. 11 Fig. 1-6NextA server controls access to resources on a networkClients, or workstations, request resources from the server

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Networks and the InternetWhat is the Internet?p. 12 Fig. 1-7NextWorldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individualsClick to view Web Link,click Chapter 1, Click Web Linkfrom left navigation, then click Internetbelow Chapter 119Networks and the Internetp. 12 - 13 Fig. 1-8Why do users access the Internet?Research and InformationShoppingBanking and InvestingClassesEntertainmentNextCommunications7.Download Music8.Share Information

20Networks and the InternetWhat is the Web?p. 12 - 14A Web site is a collection of related Web pagesA Web page contains text, graphics, audio, video, and links to other Web pagesNextBillions of documents, called Web pages, available to anyone connected to the InternetClick to view Web Link,click Chapter 1, Click Web Linkfrom left navigation, then click Sharing Videos below Chapter 121Consists of a seriesof instructions thattells the computerwhat to do and how to do itComputer SoftwareWhat is software?

p. 15NextAlso called aprogram22Computer SoftwareWhat is a graphical user interface (GUI)?

p. 15 Fig. 1-10NextAllows you to interact with the software using text, graphics, and visual images such as iconsControls how you enter data and instructions and how the screen displays information

23Computer SoftwareWhat is system software?p. 15-16Operating System (OS)is a set of programs that coordinates all activities among computer hardware devicesUtility Programs allow the user to perform maintenance-type tasks usually related to managing a computer, its devices or its programsNextPrograms that control or maintain the operations of the computer and its devicesClick to view Web Link,click Chapter 1, Click Web Link from left navigation, then click Windows Vista below Chapter 124Computer SoftwareWhat is application software?p. 16 Fig. 1-11NextPresentation GraphicsSpreadsheetDatabaseWord ProcessingPrograms designed to make users more productive

25Computer SoftwareWhat is a programmer?p. 18 Fig. 1-13NextSomeone who developssoftwareProgrammer writesthe instructions todirect the computer to process data intoinformation

JavaScript

Web application

26Categories of Computersp. 19NextWhat are the categories of computers?

Personal Computers(desktop)Mobile Computers andMobile DevicesGame ConsolesServersMainframesSupercomputersEmbedded Computers27Personal ComputersWhat is a personal computer? A computer that can perform all of its input, processing, output, and storage activities by itself. Contains a processor, memory, one or more input, output, storage devices and communication device.p. 19 - 20 Figs. 1-151-16NextClick to view Web Link,click Chapter 1, Click Web Link from left navigation, then click Personal Computers below Chapter 1

28Personal ComputersWhat is a desktop computer?p. 19-20 Fig. 1-15NextDesigned so all of the components fit entirely on or under a desk or table

29Mobile Computers and Mobile DevicesWhat is a notebook computer?p. 20 Fig. 1-17NextPortable, small enough to fit on your lapAlso called a laptop computerUsually more expensive than a desktop computer with equal capabilities

30Mobile Computers and Mobile DevicesWhat is a Tablet PC?p. 21 Fig. 1-18NextA special type of notebook computer, resembling a letter-sized slateAllows you to write on the screen using a digital penEspecially useful for taking notes

31Mobile Computers and Mobile DevicesWhat are mobile devices?p. 21 - 22NextInternet-enabledtelephone is asmart phoneSmall enough tocarry in a pocket but usually do not have disk drivesThree popular types of Mobile devices:handheld computers, PDAs,smart phones32Mobile Computers and Mobile DevicesWhat is a handheld computer?

p. 21 Fig. 1-19NextUsed by mobile employees such as meter readers and delivery peopleSmall enough to fit in one hand

33Mobile Computers and Mobile DevicesWhat is a personal digital assistant (PDA)?p. 21 Fig. 1-20NextProvides personal organizer functionsCalendarAppointment bookAddress bookCalculatorNotepad

34Mobile Computers and Mobile DevicesWhat is a smart phone?An internet-enabled phone that usually also provides PDAs capabilities.In addition to basic phone capabilities, it allows one to send and receive e-mail messages and access the Web.

p. 22 Fig. 1-21NextClick to view Web Link,click Chapter 1, Click Web Link from left navigation, then click iPhone below Chapter 1

35Game ConsolesWhat are game consoles?p. 22 Fig. 1-22NextMobile computing device designed for single-player or multiplayer video games

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ServersWhat types of servers are there?p. 23 Figs. 1-23 1-25Mainframe Very powerful, expensive computer that supports thousands of connected usersSupercomputer The fastest, most powerful, most expensive computer. Used for applications requiring complex mathematical calculationsNextA server controls access to network resources and provides centralized storage

37Embedded ComputersWhat is an embedded computer?A special-purpose computer that functions as a component in a larger productp. 24 Fig. 1-26Next

38Elements of an Information SystemWhat are information system elements?p. 25 Fig. 1-27NextHardwareSoftwareDataPeopleProcedures

39Examples of Computer UsageWhat software is available for a home user?p. 26 Fig. 1-28NextPersonal finance managementWeb accessCommunicationsEntertainmentClick to view Web Link, click Chapter 1, Click Web Link from left navigation, then click Women in Technology below Chapter 1Click to view Web Link, click Chapter 1, Click Web Link from left navigation, then click Minorities in Technology below Chapter 1

40Examples of Computer Usagep. 28 Fig. 1-30Productivity softwareSpecialty softwareWeb usageE-mailNextWhat software is available for a small office/home office (SOHO) user?

41HardwareNotebook computersTablet PCsInternet-enabled PDAsSmart phonesExamples of Computer UsageWhat is available for a mobile user?p. 29 Fig. 1-31SoftwareWord processingSpreadsheetPresentation graphicssoftwareNext

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