Introduction to Computer System

Chapter – 1

COMP4001 -Computer Skills

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

Produces and stores results

Processes data into informationinformation

Data that is organized, meaningful, and useful

Accepts datadataRaw facts, figures, and symbols

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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 programs Commands like start ,shutdown computer

(closing)

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System / Operating System Software

Programs that control or maintain the operations of the computer and its devices Operating System (OS)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)

Windows Operating System Desktop

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Application Software

Programs that perform specific tasks for users

Types Word processing ( MS-Word ) Presentation (MS-PowerPoint) Graphics Spreadsheet

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Hardware

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

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Practical Exercise (Desktop)

Use Desktop Programs option and check the following.

What are the Application software in your college computer?

What is the Operating System on your system?

What are the software of Microsoft company? What are the other interesting programs of

operating system?

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Practical Exercise

List the hardware parts which you are able to see and use.

How Keyboard is different from screen? Can you print from your system / is printer is

connected to your system.

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Windows 7 Desktop (Working Area )

ICONS

Start button

Desktop

Taskbar Notification Area

COMP400112Taskbar pinned programs

Windows Desktop (classical view -Working Area )

Start Quick Launch Taskbar Taskbar NotificationButton Toolbar Area

Icons Desktop Mouse Cursor

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Start Icon /Button

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Current user name

Frequently used programs

Search files

Recently opened items

Window Common Properties

Close

Maximize/Restore Minimize

Status Bar

Control IconTitle Bar

Menu Bar

MY COMPUTER WINDOW

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System Properties /Configuration

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.

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Windows 7 computer – Propertiesconfiguration

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Operating system Name

Processor speed & RAM capacity

Shutting down system

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

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