Presentation on theme: "INFORMATION TECHNOLOGY, THE INTERNET, AND YOU"— Presentation transcript:
1INFORMATION TECHNOLOGY, THE INTERNET, AND YOU 1CHAPTERINFORMATION TECHNOLOGY, THE INTERNET, AND YOUThe purpose of this book is to help the student become computer literateCompetent in computer–related skillsThe goal is to be valuable immediately to a potential employerChapter one gives an overview of an information systemThis system consists of the following:PeopleProceduresSoftwareHardwareData
2Competencies Explain the five parts of an information system Distinguish between application and system softwareDistinguish between special purpose and general purpose application softwareIdentify the types of computers and microcomputersDescribe the different types of hardware
3Competencies cont. Define data and describe files Explain connectivity and the wireless revolutionDescribe the Internet and the Web
4Five Parts of an Information System PeopleProceduresSoftwareHardwareDataDefine an information systemSome students may think of a system as pertaining to just the hardwareRemind them that a microcomputer is part of an information systemTo be competent end user, one must understand the essentials of ITNote that IT stands for information technology
5People Most important part of any system Contact is … Computer uses DirectIndirectComputer usesBusiness & EntertainmentEducation & MedicinePeople are the most important part of an information systemOur lives are touched everyday by computersHave students give examples of how they use computer applications throughout the daySome examples are:instant messagingWeb-based applicationspersonal websitevirus protectionTV tuners and video clipsdigital photographymusichome networkingspywarejob opportunities
6Software Programs Instructions Two major kinds of software System SoftwareApplication SoftwareEmphasize differences between application and systems softwareSystem softwareoperating systemutilitiesdevice driversApplication softwaregeneral purposespecial purpose
7System Software A collection of programs Enables the application software to interact with the hardwareBackground software that helps the computer manage its own resourcesSoftware is another name for programsPrograms are instructions that tell the computer how to process data into the form you wantTwo major kinds of softwareSystemNot a single programa collection of programsOperating systemsWindows XPMac OS XUtilitiesService programsPerforms tasks related to managing computer resourcesDevice driversApplication
8Application Software “End-user” software Two major categories General purposeSpecial purpose“End-user” software -- people who use microcomputer or have access to larger computersNearly everyone in today’s workforce and general public have accessThese people enter commands and typically interact with application programs.Two major categoriesGeneral - purpose or basic programs; off-the-shelfSpecialized - written for an organization’s or business type’s specific purpose; specially written
9Hardware Equipment that processes the data Controlled by software Physical devicesKeyboardMouseMonitorOther devicesExamples of hardware:Disk drive, keyboard, printer and modem are different types of computer hardware
10Types of Computers Supercomputers Mainframe computers Minicomputers MicrocomputersThere are four types of computersSupercomputersMainframe computersMinicomputersMicrocomputersdesktoplaptop or notebooktablet PCHandheld computersPalm computersPersona digital assistants
11Used by large organizations SupercomputersHigh capacityUsed by large organizationsTracking spaceTracking weatherAbove is an example of a Cray supercomputer, which, unlike the illustration, is always in an air conditioned boxThis is required because of the heat generated during processingA major reason for its processing speed is shorted connection wires throughout the interiorOf course, shorter wires means faster byte transfer timesSupercomputers are the most powerful type of computerNASA uses supercomputers to track and control space exploration
12Mainframe Computers Occupies specially wired, air-conditioned rooms Capable of great processing speeds and data storageNot as powerful as supercomputersMainframes occupy specially wired, air-conditioned roomsNot as powerful as supercomputersInsurance, financial and equity industries, as well as governments all process large amounts of information on mainframes
13Minicomputers Known as midrange computers Medium-size companies Used by departments of large companiesThese are refrigerator sized machinesProduction departments use minicomputers to monitor certain manufacturing processes and assembly line operation sProblem is most current desktops have capacity of many minicomputers.
14Microcomputers Least powerful Widely used Four types Desktop Notebook or laptopTablet PCHandheldLease powerful computers, but most widely usedFastest growing computerHave students begin discussing the microcomputer and wireless connectivity
15Microcomputer Hardware System unitInput/output devicesSecondary storageCommunicationsSystem UnitMemoryCPUI/O DevicesMonitorsPrintersSecondary StorageFloppyHard driveOptical disksMonitors include LCD panels and traditional CRTs. Current trends regarding monitors; sizes depending upon use of systemCommunicationsModems - equipment that translates data from the CPU to a form humans can understand
16Data Raw, unprocessed facts Processing creates information Stored electronically in filesDocument filesWorksheet filesDatabase filesPresentation filesUsed to describe facts about somethingContained in files for documents, worksheets and databasesDocument files - usually created by word processorsWorksheet files - electronic spreadsheetsDatabase files - electronic database management programsPresentation Files - electronic slides shows
17Connectivity, the Wireless Revolution, and the Internet Sharing of informationWireless communication is becoming popularComputer networksConnected communication system of computersLargest network is the InternetConnectivity is the capability of your microcomputer to share information with other computersWireless /mobile communication devices are more popular than everA network is central to the concept of connectivityAsk students questions about the Internet. Here are some facts:No one owns the InternetThere is no Internet, Inc.The Internet is a network of networksThe WWW provides multimedia interface to resources on the Internet
18A Look to the Future Computer Competent The Internet & the WebPowerful software & hardwarePrivacy & securityOrganizationsChanging TimesUsing information technology means being computer competentThe Internet and the Web are the two most important technologies of the 21st centurySoftware can now do extraordinary tasksMicrocomputers are more powerfulSociety must be careful about protecting their privacyAlmost all organizations rely on information systems
22Key Terms procedures (4) program (4) random access memory (RAM) (12) secondary storage device (14)service program (9)software (4)specialized application (10)special-purpose application (10)supercomputer (11)SimNet Concepts (8)system cabinet (12)system software (9)system unit (12)tablet PC (11)
23Key Terms temporary storage (12) utility (9) video display screen (12) Web (16)wireless revolution (16)worksheet file (15)World Wide Web (WWW) (16)
24FAQs What is an information system? What is IT? How does raw data become information?What is an operating system?What are specialized applications? Please give some examples.Is the Internet the same as the World Wide Web?
25Discussion Questions How are you using information technology? Explain the difference between system and application software.Describe some of the uses for handheld computers.Why is the wireless revolution so important?