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Looking at Computers: Understanding Looking at Computers: Understanding the Partsthe Parts

and Purpose of computers and Purpose of computers

Directions: Save to your folder and put your first name in front of the title in the file name box.

After saving press the F5 key to run the show , then click on view speaker notes and use the arrow key to advance the presentation. Then answer the summary questions at the end of the presentation

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TopicsTopics

• Hardware componentsHardware components

• Input devicesInput devices

• Output devicesOutput devices

• System unit-Central processorSystem unit-Central processor

• ErgonomicsErgonomics

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Computers are Data Computers are Data Processing DevicesProcessing Devices

• Four major functions of a computer:Four major functions of a computer:– Input dataInput data– Process dataProcess data– Output informationOutput information– Store data and informationStore data and information

DATA IN

INFORMATION OUT

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HardwareHardware•System-Processing-Processing unitSystem-Processing-Processing unit

•Peripheral DevicesPeripheral Devices

SystemSystem UnitUnit

PeripheralPeripheral DevicesDevices

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Input DevicesInput Devices

• Devices used to enter information or Devices used to enter information or instructions into the computerinstructions into the computer– KeyboardKeyboard– Mouse / pointing deviceMouse / pointing device– Microphone Microphone – ScannerScanner– Digital cameraDigital camera

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Dvorak KeyboardDvorak Keyboard

• Puts the most commonly used keys at “home keys”Puts the most commonly used keys at “home keys”• Reduces distance of finger stretchesReduces distance of finger stretches

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MouseMouse• Roller ball mouse Roller ball mouse

– Less expensiveLess expensive– Harder to keep cleanHarder to keep clean

• TrackballTrackball– Harder to controlHarder to control– Stationary on deskStationary on desk

• Optical mouseOptical mouse– Needs no mouse padNeeds no mouse pad– Doesn’t need cleaningDoesn’t need cleaning– More expensiveMore expensive

Wireless

Optical

Trackball

Standard

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Other Input DevicesOther Input Devices

• ScannersScanners– TextText– Images Images

• Digital camerasDigital cameras– Images Images – Video Video

Flatbed

Handheld

Camera Camcorder

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Inputting SoundInputting Sound• Microphone InputMicrophone Input

– TeleconferencingTeleconferencing– Voice over InternetVoice over Internet– Voice Recognition Voice Recognition

Microsoft Voice Recognition

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Output DevicesOutput Devices

• Retrieving information Retrieving information from the computerfrom the computer

• Output devices Output devices – Softcopy (video, Softcopy (video,

sounds, control sounds, control signals)signals)

– Hardcopy (print)Hardcopy (print)

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Output devices- Monitor TypesOutput devices- Monitor Types

• CRT CRT Cathode Ray TubeCathode Ray Tube

– Less ExpensiveLess Expensive– Use much more spaceUse much more space– Uses more energyUses more energy– Better viewing anglesBetter viewing angles

• LCD LCD Liquid Crystal DisplayLiquid Crystal Display

– More expensiveMore expensive– Uses far less spaceUses far less space– More energy efficientMore energy efficient– Less viewable from an angleLess viewable from an angle

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Dot-matrix

Output devices- Printers Output devices- Printers

Inkjet

Multifunction

Laser

Plotter

Thermal printer

• Impact printersImpact printers– Dot-matrixDot-matrix

• Non-impact Non-impact printersprinters– InkjetInkjet– Laser Laser – MultifunctionMultifunction

• Specialty printersSpecialty printers– PlottersPlotters– Thermal printersThermal printers

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Outputting SoundOutputting Sound

• Speakers and Speakers and HeadphonesHeadphones

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The System UnitThe System Unit

Box that contains the central electronic components of the computer::– CPU/RAM/CPU/RAM/

motherboardmotherboard– Expansion cardsExpansion cards– Power supplyPower supply– Storage devicesStorage devices

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The front panel of the system unitThe front panel of the system unit

• Drive BaysDrive Bays• Memory card Memory card

readerreader• Floppy DriveFloppy Drive• Productivity Productivity

PortsPorts• Power ButtonPower Button

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The back of the system unitThe back of the system unit

• Ports for peripheral devicesPorts for peripheral devices

• Types of ports:Types of ports:– SerialSerial– ParallelParallel– VGAVGA– USBUSB– ConnectivityConnectivity

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Inside the System UnitInside the System Unit

• Essential Essential electronic electronic components used components used to process datato process data

• Types of Types of components:components:– Power supplyPower supply– Hard disk driveHard disk drive– MotherboardMotherboard– CPUCPU– Expansion cardsExpansion cards

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The MotherboardThe Motherboard

• CPUCPU

• RAMRAM

• Expansion Expansion CardsCards

• Chip SetChip Set

• Built-in Built-in componentscomponents

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Storage DevicesStorage Devices

• Enables the storage of data or information Enables the storage of data or information to be accessed again to be accessed again

Hard Disk Drive CD / DVD DriveFloppy Disk

Flash Drive

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Permanent StoragePermanent StorageHard Disk DriveHard Disk Drive

• Stores data and program Stores data and program instructionsinstructions

• Permanent (nonvolatile) Permanent (nonvolatile) storagestorage

• Storage capacities up to Storage capacities up to 250 GB and higher250 GB and higher

• Transfers data in Transfers data in millisecondsmilliseconds

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Expansion CardsExpansion Cards

• Adds functionsAdds functions

• Provides new connections for peripheral Provides new connections for peripheral devicesdevices

• Common types:Common types:– SoundSound– ModemModem– Video (VGA)Video (VGA)– Network (NIC)Network (NIC)

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Computer SoftwareComputer Software

• SoftwareSoftware - programs - programs that enable the hardware that enable the hardware to perform different tasksto perform different tasks

• Application/productivity Application/productivity softwaresoftware– Tools for getting things Tools for getting things

donedone

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Computer SoftwareComputer Software

• System softwareSystem software– Essential for platform operation and supportEssential for platform operation and support

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Computer Platforms: Computer Platforms: PCs and MacsPCs and Macs

PCPC• CPU – Intel, AMDCPU – Intel, AMD• Operating system – Operating system –

Microsoft WindowsMicrosoft Windows

MacMac• CPU – MotorolaCPU – Motorola• Operating system – Operating system –

Apple Mac OSApple Mac OS

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Specialty ComputersSpecialty Computers

• PDAPDA• ServerServer• MainframeMainframe• SupercomputerSupercomputer• Microcontrollers Microcontrollers

Server

Mainframe

Supercomputer

PDA

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Setting it all up: ErgonomicsSetting it all up: Ergonomics

• Ergonomics refers to Ergonomics refers to minimizing injury or minimizing injury or discomfort while using discomfort while using the computerthe computer

• Steps to follow:Steps to follow:– Position monitor correctlyPosition monitor correctly– Use adjustable chairUse adjustable chair– Assume proper position Assume proper position

while typingwhile typing– Take breaksTake breaks– Ensure adequate lightingEnsure adequate lighting

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Assessment/summary questionsAssessment/summary questions

• Type the answer to the question on each Type the answer to the question on each slide in the text box. If you need to go back slide in the text box. If you need to go back through the slide show to find answers.through the slide show to find answers.

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Name the four major functions of a Name the four major functions of a computercomputer

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What are the devices that let you What are the devices that let you put data into the computer called ? put data into the computer called ?

Give at lease three examplesGive at lease three examples

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What devices enable the user to What devices enable the user to see or hear the processed see or hear the processed

information? Give examplesinformation? Give examples

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What’s on the front of the system What’s on the front of the system unit?unit?

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What’s on the back of the system What’s on the back of the system unit?unit?

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What’s inside the system unit?What’s inside the system unit?Label as either a storage or Label as either a storage or

processing deviceprocessing device

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What are the devices that let you What are the devices that let you store data called? Give examplesstore data called? Give examples

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Ergonomics-What can you do to Ergonomics-What can you do to reduce injury or discomfort while reduce injury or discomfort while

using a computer?using a computer?

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Additional resourceAdditional resource

• Raise your hand when you are doneRaise your hand when you are done• Once I give you the okay you can watch the videoOnce I give you the okay you can watch the video• Click on the link to view a video on the parts of a Click on the link to view a video on the parts of a

computer. Make sure you have a set of head phones firstcomputer. Make sure you have a set of head phones first• Video LinkVideo Link