Basic Computer Terms Unit 1—Part A - PowerPoint Presentation

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Basic Computer TermsUnit 1—Part A

Digital Literacy(Strand 1 Standard 2-3)Slide2

Why Study Basic Terms?

For some people, the computer aisles at an electronics store can be quite a mystery!Use 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 he/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 tablets

And many more…Slide9

ProcessingManipulating data

Bold, italicize, underline, double space in a word processorEnter formulas and calculate totals in a spreadsheetEdit a pictureSlide10

OutputThe results of processed data

Examples of output:A printed paperA presentationAudioVideo

D

ata

is entered through various forms (input) into a computer, the data is

manipulated (processing),

and then information is presented to a human (output).Slide11

Output DevicesMonitor

SpeakersPrinterHeadphonesSlide12

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, DVD

Flash DriveSlide13

PeripheralsAKA—Peripheral Devices

Any hardware device connected to the computer that expands the computer’s input, output and storage capabilitiesSlide14

Input

Output

DevicesSlide15

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 Keys

Function Keys

Command Keys

Connected 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 desktop

Older = ball style mouse

Newer = “optical” technology

Turn 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 computer

As you slide your finger over the surface, sensors underneath detect the movement, direction and speed

Useful 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 device

Advantages:

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 stylus

U

sually 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 buyC

an print it both black and white or color

Limitations:

Slow

Not designed for high-volume printing

Ink 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 purchase

Capable 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:EngineersArchitects

Map makersSlide34

The End