O leary2012 comp_ppt_ch07

Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill

Chapter 07: Input and Chapter 07: Input and OutputOutput

Chapter 07: Input and Chapter 07: Input and OutputOutput

Copyright © 2012 The McGraw-Hill Companies, Inc. All rights reserved.

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7-2McGraw-Hill

CompetenciesCompetencies (Page 1 of 2)(Page 1 of 2)

• Define inputDefine input• Describe keyboard entry including the Describe keyboard entry including the

different types of keyboards and different types of keyboards and keyboardkeyboard features features

• Discuss pointing devices including mice, Discuss pointing devices including mice, touch screenstouch screens, , joysticksjoysticks, and , and stylusstyluseses

• Describe scanning devices including Describe scanning devices including optical scannersoptical scanners and and card readerscard readers

• Discuss image capturing devices Discuss image capturing devices including including digital camerasdigital cameras and and digital digital video camerasvideo cameras


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Competencies Competencies (Page 2 of 2)(Page 2 of 2)

• Define outputDefine output• Discuss Discuss monitorsmonitors features, features, flat-panelflat-panel, ,

CRTCRT, , e-book readerse-book readers, , data projectorsdata projectors, , and and HDTVHDTVss

• Define printing features as well as Define printing features as well as ink-jetink-jet, , laserlaser, , dot-matrixdot-matrix, , thermalthermal, , plotterplotter, , photophoto, and , and portableportable printersprinters

• Discuss audio-output devicesDiscuss audio-output devices• Define combination input and output Define combination input and output

devicesdevices


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7-4McGraw-Hill

IntroductionIntroduction

• Have you ever wondered Have you ever wondered how information gets into how information gets into your computer or comes your computer or comes out in a form you can use? out in a form you can use? – Input devices convert what Input devices convert what

we understand into what the we understand into what the system unit can processsystem unit can process

– Output devices convert what Output devices convert what the system unit has the system unit has processed into a form that processed into a form that we can understandwe can understand


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What is Input?What is Input?

• Any data or instructions used by a Any data or instructions used by a computercomputer

• Input devices translate data into a Input devices translate data into a form that the form that the system unit can processsystem unit can process

• Some hardware input devices include:Some hardware input devices include:– KeyboardsKeyboards– Pointing devicesPointing devices– Scanning devicesScanning devices– Other devices Other devices


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Keyboard Entry Keyboard Entry (Page 1 of (Page 1 of

2)2) • KeyboardsKeyboards

– Traditional keyboardsTraditional keyboards– Ergonomic keyboardsErgonomic keyboards– Wireless keyboardsWireless keyboards– PDA keyboardsPDA keyboards– Virtual keyboardsVirtual keyboards

• FeaturesFeatures– Typewriter keyboard with numeric Typewriter keyboard with numeric

keypadkeypad– Special purpose keysSpecial purpose keys

• ToggleToggle• Combination KeysCombination Keys


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7-7McGraw-Hill

Keyboard Entry Keyboard Entry (Page 2 of 2) (Page 2 of 2) Traditional KeyboardTraditional Keyboard


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Pointing Devices Pointing Devices (Page 1 (Page 1

of 2)of 2) • MiceMice

– MechanicalMechanical– Optical Optical – Cordless or wirelessCordless or wireless

• Three similar devices to miceThree similar devices to mice– TrackballTrackball– Touch padsTouch pads– Pointing stickPointing stick


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Pointing Devices Pointing Devices (Page 2 (Page 2

of 2)of 2) • JoystickJoystick• Touch ScreenTouch Screen

– Multi-touch screen Multi-touch screen

• StylusStylus


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Scanning Devices Scanning Devices (Page 1 (Page 1 of 2)of 2)

• Optical scannersOptical scanners– Flatbed scannersFlatbed scanners– Document scanners Document scanners – Portable scannersPortable scanners

• Card ReadersCard Readers– Magnetic card readersMagnetic card readers– Radio FrequencyRadio Frequency

card readerscard readers


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Scanning Devices Scanning Devices (Page 2 (Page 2

of 2)of 2) • Bar code readersBar code readers

– Handheld Handheld wand readers wand readers or platform scannersor platform scanners

– Contain photoelectric cellsContain photoelectric cellsthat read that read bar codes bar codes

• Character and markCharacter and markrecognition devicesrecognition devices– Magnetic ink character Magnetic ink character

recognition (MICR)recognition (MICR)– Optical-character recognition Optical-character recognition

(OCR)(OCR)– Optical-mark recognition (OMR)Optical-mark recognition (OMR)


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Image Capturing Image Capturing DevicesDevices

• Digital camerasDigital cameras– Images recorded digitally on a disk Images recorded digitally on a disk – Images can be downloaded to a computer Images can be downloaded to a computer

• Digital video camerasDigital video cameras– Records motion digitally Records motion digitally – Can take still images as wellCan take still images as well– WebCamsWebCams

• Specialized digitalSpecialized digitalvideo camerasvideo cameras

• Broadcast imagesBroadcast imagesover the Internet over the Internet


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Instant Messaging and Instant Messaging and WebCamsWebCams

• Exchange messages and files with Exchange messages and files with friendsfriends

• Voice and video capabilitiesVoice and video capabilities• Application sharingApplication sharing


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Audio-Input DevicesAudio-Input Devices

• Voice recognition systemsVoice recognition systems– Use a microphone, a sound card,Use a microphone, a sound card,

and special softwareand special software– Users can operateUsers can operate

computers and createcomputers and createdocuments usingdocuments usingvoice commandsvoice commands


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What is Output?What is Output?• Processed data or informationProcessed data or information• Types of outputTypes of output

– TextText– Graphics/PhotosGraphics/Photos– Audio & videoAudio & video

• Output devicesOutput devices– MonitorsMonitors– PrintersPrinters– Other DevicesOther Devices


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Monitors Monitors (Page 1 of 2)(Page 1 of 2)

• Known as screens or display screensKnown as screens or display screens• Output referred to as soft copy Output referred to as soft copy • Features Features

– ResolutionResolution//pixelspixels– Dot pitchDot pitch– Refresh rateRefresh rate– Size Size


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Monitors Monitors (Page 2 of 2)(Page 2 of 2)

• Cathode-ray tube (CRT) monitorsCathode-ray tube (CRT) monitors• Flat-panel monitorsFlat-panel monitors

– Require less power to operateRequire less power to operate– Portable and thinner than CRTsPortable and thinner than CRTs

• Other monitorsOther monitors– E-books readersE-books readers– Data projectorsData projectors– High-definitionHigh-definition

television (HDTV) television (HDTV)


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Printers Printers (Page 1 of 2)(Page 1 of 2)

• Translates information that has been Translates information that has been processed by the system unitprocessed by the system unit

• Output referred to as hard copyOutput referred to as hard copy• FeaturesFeatures

– ResolutionResolution– Color capabilityColor capability– SpeedSpeed– MemoryMemory– Duplex printingDuplex printing


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Printers Printers (Page 2 of 2)(Page 2 of 2)

• Ink-jet printerInk-jet printer• Laser printerLaser printer

– Personal laser printersPersonal laser printers– Shared laser printersShared laser printers

• Thermal printerThermal printer• Other printersOther printers

– Dot-matrix printersDot-matrix printers– PlottersPlotters– Photo printersPhoto printers– Portable printersPortable printers


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7-20McGraw-Hill

Audio-Output DevicesAudio-Output Devices

• Translates audio information from the Translates audio information from the computer into sounds that people can computer into sounds that people can understandunderstand

• Common devicesCommon devices– SpeakersSpeakers– HeadphonesHeadphones

• Digital Music PlayerDigital Music Player– iPodiPod– iRiveriRiver


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Combination Input and Output Combination Input and Output DevicesDevices

• Fax machinesFax machines• Multifunctional Devices (MFD)Multifunctional Devices (MFD)• Internet telephonesInternet telephones

– Known as Known as Internet telephony Internet telephony – IP telephonyIP telephony– Voice-over IP (VoIP)Voice-over IP (VoIP)


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Internet Telephone Internet Telephone ApproachesApproaches

• Computer-to computerComputer-to computer– Free long distance callsFree long distance calls– Requires computers to be connected to the InternetRequires computers to be connected to the Internet– MSN is most widely used softwareMSN is most widely used software

• Computer-to traditional telephoneComputer-to traditional telephone– Place the call from a computer to a phone Place the call from a computer to a phone – Requires an Internet phone service providerRequires an Internet phone service provider

• Software requirementsSoftware requirements• Small monthly and/or per-minute feeSmall monthly and/or per-minute fee

• Traditional telephone-to-traditional telephoneTraditional telephone-to-traditional telephone– Does not require a computerDoes not require a computer– Subscription required to a special Internet phone Subscription required to a special Internet phone

service providerservice provider• Special hardware adapterSpecial hardware adapter• Cost is similar to the computer-to-traditional telephone Cost is similar to the computer-to-traditional telephone

approachapproach


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Careers In ITCareers In IT• Technical writersTechnical writers prepare instruction prepare instruction

manuals, technical reports, and manuals, technical reports, and other scientific or technical other scientific or technical documentsdocuments

• Typically requires a college degreeTypically requires a college degree– CommunicationsCommunications– JournalismJournalism– EnglishEnglish– Specialization or familiarizationSpecialization or familiarization

with a technical fieldwith a technical field

• Technical writers can expect toTechnical writers can expect toearn $46,500 to $76,500 annually.earn $46,500 to $76,500 annually.


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7-24McGraw-Hill

A Look to the FutureA Look to the FutureElectronic Translators May Be in Your Electronic Translators May Be in Your FutureFuture

• Electronic Interpretation may soon Electronic Interpretation may soon exist to provide personal exist to provide personal interpretation for foreign languages interpretation for foreign languages and imagesand images

• Prototype portable handheld Prototype portable handheld electronic interpreters are currently electronic interpreters are currently inina testing phase at the U.S. a testing phase at the U.S. Office of Naval ResearchOffice of Naval Research


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Open-Ended Questions Open-Ended Questions (Page 1 of 2)(Page 1 of 2)

• Define input devices.Define input devices.

• Describe the different types of Describe the different types of keyboard, pointing, scanning, keyboard, pointing, scanning, image capturing, and audio-input image capturing, and audio-input devices.devices.

• Describe the three categories of Describe the three categories of output devices.output devices.


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Open-Ended Questions Open-Ended Questions (Page 2 of 2)(Page 2 of 2)

• Define output devices.Define output devices.

• What are combination input and What are combination input and output devices? Give examples output devices? Give examples of such devices.of such devices.

Education

O leary2012 comp_ppt_ch07