Components of the system unit

COMP5001 -Computer Skills

Lecture -2

COMPUTER DEFINITION

It is a electronic device that accepts input , processes data, stores data and produces output.

Example Calculator -

It accepts only numbers , does simple math process( +,-,*,/ ) , produces output /result on screen

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COMPUTER DEFINITION

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Produces and stores results

Processes data into information

Data that is organized, meaningful, and useful

Accepts dataRaw facts, figures, and symbols

COMPONENTS OF COMPUTER SYSTEM

Software ( Programs /Set of instructions)

Hardware (Physical Parts)

Computer works with the help of software and Hardware

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SOFTWARE

Set of instructions which tell computer what to do .

They are also called programsCommands like

start ,shutdown computer (closing)

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SYSTEM / OPERATING SYSTEM SOFTWAREPrograms that control or maintain the operations of the

computer and its devices Operating System (OS)

Set of programs that coordinates all activities among computer hardware devices and allows users to run application software

Every computer system has( must ) at least one operating system

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TYPES OF OPERATING SYSTEM

Windows ( 7,XP, Vista)GUI, Famous, User Friendly

Unix, Sco-Unix

DOS ( very old)

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Windows Operating System Desktop

APPLICATION SOFTWARE

Programs that perform specific tasks for users

Types

Word processing ( MS-Word )

Presentation (MS-PowerPoint)

Graphics (Adobe Photoshop)

Spreadsheet (MS-Excel)

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HARDWARE

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Any peripheral devices ( Physically which we can and touch)and components (inside covered) of the computer

SYSTEM PROPERTIES /CONFIGURATION

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To see your computers operating system

1. Click on ‘My computer’ on desktop / from ‘Start’ Menu

2. Keeping your mouse cursor in ‘My computer ‘ Window , Right click on mouse and select ‘Properties’ option

3. The ‘System Properties’ window is displayed with system details.

WINDOWS 7 COMPUTER – PROPERTIESCONFIGURATION

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Operating system Name

Processor speed & RAM capacity

SHUTTING DOWN SYSTEM

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Shutdown or logoff your computer after using or when you don’t want to use computer system