Computer Technology S1 Obj 12 and Obj 23 Why Study Basic Terms For some people the computer aisles at an electronics store can be quite a mystery Prepare for the State Skills Test ID: 723618
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Basic Computer TermsUnit 1—Part A
Computer Technology(S1 Obj 1-2 and Obj 2-3)Slide2
Why Study Basic Terms?
For some people, the computer aisles at an electronics store can be quite a mystery!Prepare for the State Skills TestUse computers in your future with ease and confidenceSlide3
What is a Computer?
An electronic device that you can use to manipulate, store, retrieve and process data.Slide4
Information Processing CycleSlide5
HardwareThe physical, touchable parts of the computer.Slide6
SoftwareA term that is used in contrast to hardware; everything in the computer that is not hardware is software.
Software allows you to:Process wordsCalculate numbersSend an e-mailBrowse the InternetAnd many more… Slide7
Input
A collection of raw data from the outside world that is put into the computer.Example: The payroll clerk collects workers' timecards so she knows how many hours each person worked and then types the hours from the timecards into a spreadsheet.Slide8
Input DevicesKeyboard
MouseScannerDigital CameraBar code reader Graphic tabletsAnd many more…Slide9
ProcessingManipulating data
Bold, italicize, underline, double space in a word processorEnter formulas and calculate totals in a spreadsheetEdit a pictureSlide10
StorageThe place where data is held when it is not needed for processing
Storage Devices are computer components capable of storing digital dataExamples of Storage Devices:Floppy Disk (almost obsolete)Hard DriveCD, DVDFlash DriveSlide11
OutputThe results of processed data
Examples of output:A printed paperA presentationAudioVideoData is entered through various forms (input) into a computer, the data is manipulated (processing), and then information is presented to a human (output).Slide12
Output DevicesMonitor
SpeakersPrinterHeadphonesSlide13
PeripheralsAKA—Peripheral Devices
Any hardware device connected to the computer that expands the computer’s input, output and storage capabilitiesSlide14Slide15
Input and Output Devices
As you continue, you will review several different input and output devices. You need to be able to identify each device, tell if it is an input or output device and indicate what the devices are used for.Slide16
Keyboard
The most commonly used input deviceIt is made up of :Alphabetic KeysNumeric KeysFunction KeysCommand KeysConnected to the computer through a USB connection or wirelesslySlide17
Mouse
A hand-operated input device that controls the cursor on the screen as you move it around on a desktopOlder = ball style mouseNewer = “optical” technologyTurn over your mouse. Do you see a red light? If you do, then you are using an optical mouse.Slide18
Touchpad
An input device used to move the cursor on a laptop computerAs you slide your finger over the surface, sensors underneath detect the movement, direction and speedUseful when carrying a mouse is not practicalSlide19
Trackball
A pointing device that works like a mouse turned upside down; the ball in on top of the deviceAdvantages:TrackBall is stationary so it does not require much space. You can place a trackball on any type of surface, including your lap. Slide20
Joystick
Joysticks are input devices, similar to a mouse, that allow you to move the cursor in any directionJoysticks were originally used by pilots as part of an airplane's controls. Technology developed to let gamers experience a more realistic game environmentSlide21
Microphone
A microphone is used to input soundThe sound is detected by the microphone and an electronic signal is transmitted to the computerSpecial hardware is used to convert the analog data (sound) into digital data so it an be stored and manipulated on the computer.Slide22
Scanner
Scanners are used to convert images or text on paper into a digital image format (.bmp, .gif, .jpeg)Scanners with optical character recognition can convert text on paper into text that can be edited in a word processorSlide23
Web Cam
Web cam is short for ‘web camera’It is an input device that captures a video or image of the scene in front of itSome are built into the computer (i.e. Laptop), others are connected via USB cableUsed for chatting online, security and tourism (i.e. view your favorite animal at the zoo online)Slide24
Graphics Tablet
Graphics tables are used by graphics designers and illustrators to input dataCreate accurate drawings on a screen that could not be produced with a mouse or stylusUsually consists of a tablet that you draw on and a pen that has pressure sensitive tips allowing the artist to draw heavier and lighter linesSlide25
Biometric Devices
AKA—Access Control DevicesUses a body feature of a person seeking access to identify and authorize that personFingerprint scannerIris scanAccess card (can be scanned like a credit card or contain a radio frequency transmitter used to identify the card holder)Britain and Germany have included a microchip in their passport. The microchip contains electronic data unique to each user Slide26
Monitor
Most commonly used output deviceThe picture on a monitor is made up of tiny colored dots called pixelsThe quality and detail of the picture depends on the number of pixels that the monitor can displaySlide27
Ink Jet Printer
An output device that produces a hard copy by spraying ink on paperRelatively cheap to buyCan print it both black and white or colorLimitations:SlowNot designed for high-volume printingInk cartridges are expensiveSlide28
Laser Jet Printer
A output device that prints similar to a photo copy machineUses powdered ink called ‘toner’ to fuse onto the paper by heat and pressureBlack and white versions are relatively cheap to purchaseCapable of quick high-volume printingSlide29
Speakers
Most computers have a small internal speaker that produces beeping sounds when you make an errorComputers can be fitted with a sound card which enables sound (audio) to be output through external speakersSlide30
Digital Camera
An input device that takes photographs and stores them as digital files on a computerSlide31
Projector
A device which connects to a computer and is used to project the output from the computer onto a wall or screen.Slide32
Touch Screen
The only device that serves as both an input and output deviceYou view the options available to you on the screen (output) and then use your finger to touch the option you have chosen (input)Slide33
Plotter
A large document printer which is able to draw high quality images on very large pieces of paper (example: 3 feet wide by 10 feet long)Used by:EngineersArchitectsMap makersSlide34
The End