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Basic Computer Structure

Yanjmaa.B

Computer Department

Contents

What this is computer?1.

Computer Structure2.

Operation System3.

Antivirus4.

About computer

A computer is a programmable machine.The first electronic digital computers were

developed between 1940 and 1945 in the United Kingdom and United States

Today is most often used to refer to the desktop and laptop computers that most people use.

Computer Structure

Power SupplyStructure

CPU

RAM

Hard disk

Mainboard

Case

Example of a Computer Structure

CPU (Central Processing Unit)

)It is the core of a computer.Speed -> GHz1G ~ 1,000 MHz1M = 1Million / second

RAM (Random Access Memory)

Act as a temporary Storage.All data stored in memory are volatile. Memory Size is around 256MB / 512MB /1GB/

2GB

Classification Of RAM

Static RAM

RAM

Dynamic RAM

SlowerNeeds refreshing

SlowerNeeds refreshing

CheaperLow powerHigh Density

CheaperLow powerHigh Density

Dynamic RAMDynamic RAM

AdvantageAdvantage DisadvantageDisadvantage

Static RAMStatic RAMFasterNo need refresh

FasterNo need refresh

More ExpensiveUsing more powerLow density

More ExpensiveUsing more powerLow density

Hard Disk

Used to stored data permanently.Different Interface :

(Speed : ATA < SATA < SCSI)

Main Board / Mother Board (MB)

Provide a platform to connecting all the devices.

(Keyboard / Mouse / Power / CPU / Memory / Hard Disk / Floppy Disk / Display Card etc)

I/O Device & Interface

1. ATA / SATA /SCSI (For Hard Disk)

2. Parallel Port or LPT Port (For Printer)

3. COM Port (For Modem)

4. RJ45 Socket (For Network)

5. PS/2 (For Keyboard / Mouse)

6. D-Sub / DVI (For Monitor)

7. USB (All compatible device)

I/O Device & Interface

Parallel Port or LPT Port (For Printer)

I/O Device & Interface

ATA / SATA /SCSI (For Hard Disk)

I/O Device & Interface

COM Port (For Modem)

I/O Device & Interface

RJ45 Socket (For Network)

I/O Device & Interface

PS/2 (For Keyboard / Mouse)

I/O Device & Interface

D-Sub / DVI (For Monitor)

I/O Device & Interface

USB (All compatible device)

Power Supply

Power Supply convert the A.C. Voltage to Lower D.C. Voltage which is suitable for Computer.

Case

Case is used to place the main board and the power supply.

Most case have

external USB connection.

Operation System

An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs.

List of Top 5 Operation System

1. Linux

2. Windows 7

3. Windows Vista

4. Mac OS X

5. Windows XP

Operation system

Antivirus

ss

“Antivirus" is protective software designed to defend your computer against malicious software

List of Top Antivirus (2012.10.03)

1. Kaspersky Anti-Virus 2010

2. Symantec Norton AntiVirus 2010 

3. BitDefender Antivirus 2010

4. Eset NOD32

5. Panda Antivirus Pro 2010

6. Alwil Avast 4 Professional Edition

7. Grisoft AVG 7.5 Professional

8. Trend Micro

9. McAfee VirusScan

10.F-secure

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