1. Basic Computer Structure
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Computer Department

2. Contents
1. What this is computer?
2. Computer Structure
3. Operation System
4. Antivirus

3. 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.

4. Computer Structure
CPU Mainboard
RAM Structure Power Supply
Hard disk Case

5. Example of a Computer Structure

6. CPU
(Central Processing Unit)
)
It is the core of a computer.
Speed -> GHz
1G ~ 1,000 MHz
1M = 1Million / second

7. RAM (Random Access Memory)
Act as a temporary Storage.
All data stored in memory are volatile.
Memory Size is around 256MB / 512MB /1GB/
2GB

8. Classification Of RAM
RAM
Static RAM Dynamic RAM

9. Advantage Disadvantage
Cheaper Slower
Dynamic RAM Low power Needs refreshing
High Density
Faster More Expensive
Static RAM No need refresh Using more power
Low density

10. Hard Disk
Used to stored data permanently.
Different Interface :
(Speed : ATA < SATA < SCSI)

11. 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)

12. 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)

13. I/O Device & Interface
Parallel Port or LPT Port (For Printer)

14. I/O Device & Interface
ATA / SATA /SCSI (For Hard Disk)

15. I/O Device & Interface
COM Port (For Modem)

16. I/O Device & Interface
RJ45 Socket (For Network)

17. I/O Device & Interface
 PS/2 (For Keyboard / Mouse)

18. I/O Device & Interface
D-Sub / DVI (For Monitor)

19. I/O Device & Interface
USB (All compatible device)

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

21. Case
Case is used to place the main board and the
power supply.
Most case have
external USB connection.

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

23. List of Top 5 Operation System
1. Linux
2. Windows 7
3. Windows Vista
4. Mac OS X
5. Windows XP

24. Operation system

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

26. 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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