COMPUTER SKILLSCOMPUTER SKILLSfor the 21for the 21stst Century Century

INTRODUCTION TO INTRODUCTION TO COMPUTERSCOMPUTERS

Com1-4Com1-4

Use the words below to write a Use the words below to write a definition of the word definition of the word “computer.”“computer.”

InstructionsInstructions OutputOutput StoreStore ElectronicElectronic

MachineMachine MemoryMemory ProcessProcess InputInput

WHAT IS A COMPUTER WHAT IS A COMPUTER AND WHAT DOES IT AND WHAT DOES IT DO?DO?

WHAT IS A COMPUTER WHAT IS A COMPUTER AND WHAT DOES IT AND WHAT DOES IT DO?DO?

An electronic machine,An electronic machine,

operating under the operating under the

control of instructions control of instructions stored in its own memory,stored in its own memory,

Definition of Definition of Computer, Computer, continued . . .continued . . . that can accept data (that can accept data (inputinput),),

manipulate data according to manipulate data according to specified rules (specified rules (processprocess),),

produce results (produce results (outputoutput), and ), and

storestore the results for future use. the results for future use.

WHAT DOES A WHAT DOES A COMPUTER DO?COMPUTER DO?

Information Information Processing CycleProcessing Cycle– InputInput– ProcessProcess– OutputOutput– StorageStorage

WHAT DOES A COMPUTER WHAT DOES A COMPUTER DO?DO?

DataData: : collection of collection of raw facts, raw facts, figures, and figures, and symbols symbols entered into entered into the computerthe computer

. . .. . .continuedcontinued InformationInformation

: data that : data that is organized is organized and used in a and used in a meaningful meaningful mannermanner

WHAT MAKES A WHAT MAKES A COMPUTER SO COMPUTER SO POWERFUL?POWERFUL?

WHAT MAKES A WHAT MAKES A COMPUTER SO COMPUTER SO POWERFUL?POWERFUL?

SpeedSpeed- - how fast info flows along how fast info flows along circuitscircuits

ReliabilityReliability-- low failure rateslow failure rates

AccuracyAccuracy-- generate error free generate error free results with accurate data results with accurate data

((GIGOGIGO-Garbage in Garbage out)-Garbage in Garbage out)

. . .. . .continuedcontinued

StorageStorage-- can hold can hold enormous amounts of dataenormous amounts of data

CommunicationsCommunications-- allow allow computers to “talk” to each computers to “talk” to each other; sharing data, other; sharing data, instructions and informationinstructions and information

HOW DOES A COMPUTER HOW DOES A COMPUTER KNOW WHAT TO DO?KNOW WHAT TO DO?HOW DOES A COMPUTER HOW DOES A COMPUTER KNOW WHAT TO DO?KNOW WHAT TO DO?

Computer programsComputer programs– A series of instructions that tell A series of instructions that tell

the hardware of a computer the hardware of a computer how to perform taskshow to perform tasks

COMPUTER SOFTWARECOMPUTER SOFTWARECOMPUTER SOFTWARECOMPUTER SOFTWARE

1.1. System SoftwareSystem Software– contains instructions that coordinate contains instructions that coordinate

all the activities of hardware devices all the activities of hardware devices and run application softwareand run application software

GUI (Graphical user interface): GUI (Graphical user interface): Uses graphical images such as iconsUses graphical images such as icons Microsoft Windows 2000, Windows XP, Vista, Microsoft Windows 2000, Windows XP, Vista,

Windows 7Windows 7

COMPUTER COMPUTER SOFTWARESOFTWARECOMPUTER COMPUTER SOFTWARESOFTWARE

2. 2. Application SoftwareApplication Software- programs - programs designed to perform specific tasks designed to perform specific tasks for usersfor users

– PackagedPackaged softwaresoftware::meets needs of many users (Office 2007)meets needs of many users (Office 2007)

– Custom softwareCustom software::designed to perform specific functionsdesigned to perform specific functions

– Shareware:Shareware:distributed free for a trial perioddistributed free for a trial period

– Freeware and public-domain softwareFreeware and public-domain software:: no cost to users but copyrightedno cost to users but copyrighted

THE COMPONENTS OF THE COMPONENTS OF A COMPUTERA COMPUTER

1. 1. Input Input DevicesDevices– KeyboardKeyboard– MouseMouse– MicrophoneMicrophone

THE COMPONENTS OF THE COMPONENTS OF A COMPUTER, A COMPUTER, continued . . .continued . . .

2. 2. Output Output DevicesDevices

– MonitorMonitor

– PrinterPrinter

– SpeakersSpeakers

THE COMPONENTS OF THE COMPONENTS OF A COMPUTER, A COMPUTER, continued . . .continued . . .

THE COMPONENTS OF THE COMPONENTS OF A COMPUTER, A COMPUTER, continued . . .continued . . .

3. 3. System UnitSystem Unit– Box-like case that Box-like case that

houses the electronic houses the electronic components of the components of the computer that are used computer that are used to process datato process data

CPU (Central Processing CPU (Central Processing Unit)Unit)

THE COMPONENTS OF THE COMPONENTS OF A COMPUTER, A COMPUTER, continued . . .continued . . .4. 4. Storage DevicesStorage Devices

– Hard Drive (internal/external)Hard Drive (internal/external)

– CD-ROM/driveCD-ROM/drive

– DVD-ROM/driveDVD-ROM/drive

– Flash drive (USB)Flash drive (USB)

THE COMPONENTS OF A THE COMPONENTS OF A COMPUTER, COMPUTER, continuted . . .continuted . . .

5. 5. Communications DevicesCommunications Devices

– Modem (dial up)Modem (dial up)

– Cable/FIOS (fiber optic)Cable/FIOS (fiber optic)

– DSLDSL

– High speed wirelessHigh speed wireless

THE COMPONENTS OF THE COMPONENTS OF A COMPUTERA COMPUTER

1.1. Input DevicesInput Devices

2.2. Output Devices Output Devices

3.3. System UnitSystem Unit

4.4. Storage DevicesStorage Devices

5.5. Communications Communications DevicesDevices

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