about computer system

2. This Presentation
Presented by janoon
Group
 Group Leader
◦ Fayyaz Aqeel
 Group Members
◦ Ali Raza
◦ M. Zubair
◦ M. Shoaib

3. What is the Computers?
 Computer is a Electronic Device.
 Computer have four (4) main parts.
◦ CPU
◦ Monitor
◦ Key Board
◦ Mouse

4. Storage Unit

5. CPU
After completing this presentation. The
students will be able to know.
What is the function of CPU and how it
works.
This presentation also describes the
importance of the central processing
unit.

6. CPU (Central Processing Unit)
 CPU is the brain of the computer system.
 All the processing is done by the CPU.
 It has two main parts.
 CU
 ALU

7. CU (Control Unit)
 The Control Unit (CU) is a component of
a computer’s central processing unit
(CPU) that direct operation of the
processor.
 It tells the computer’s memory,
arithmetically and logically.

8. ALU(Arithmetic & Logic Unit)
An arithmetic logic unit (ALU) is a
digital circuit used to perform
arithmetic and logic operations.
It represents the fundamental building
block of the central processing unit
(CPU) of a computer.
The ALU is divided into an AU and LU.
ALU
AU
LU

9. AU (Arithmetic Unit)
The AU performs the arithmetic
operations.
Example.
Addition +
Subtraction -
Multiplication x
Divisions /

10. LU (Logic Unit)
LU is also part of ALU. It compares
two quantities and gives answer in the
form of True and False.
Example.
2 < 3 = T
5 > 6 = F
3 > 6 = F
6 > 3 = T

11. Cache Memory
It is a very high speed memory which
is used to increase / enhance the
capability of the computer.

12. RAM (Random Access Memory)
RAM is the primary storage device, a
RAM chip is volatile and requires a
constant source of power to retain
information. When power is lost or
turned off , a RAM chip will lose the
information stored on it.

13. Types of RAM
Types of RAM
FPM RAM (Fast Page Mode RAM)
EDO RAM (Extended Data Out RAM)
S RAM (Static RAM)
D RAM (Dynamic RAM)
DDR RAM (Double Data Rate RAM)
DDR2 RAM (Double Data Rate 2 RAM)

14. HDD (Hard Disk Drive)
 The hard disk drive is the main, and usually
largest, data storage hardware device in a
computer.
 The operating system, software titles and
most other files are stored in the hard disk
drive.

15. If
you have
any
Question?