COMPUTER WHIZ 4

Whiz’s File

• Chapter 1 Reviewing computers• Chapter 2 Pioneers of Computers• Chapter 3 About the CPU• Chapter 4 Storing Data• Chapter 5 Whiz through Software• Chapter 6 Introducing Spreadsheet• Chapter 7 Programming Languages• Chapter 8 More on Multimedia• Chapter 9 Computer Networks

CHAPTER 3ABOUT THE CPU

CONTENTS• Introduction to CPU• components of CPU

a) ALUb) CUc) MU

• Disk divesHard disk driveCD driveDVD driveUSB port

Introduction to CPU

BRAIN OF COMPUTER

The Central Processing Unit is the brain of the computer.

It control and process all the information in the computer.

CPU is housed on a single chip called microprocessor.

It is located in system unit.

CPU FAN

COMPONENTS OF CPU• The CPU has three components .

1. ALU(Arithmetic Logic Unit): Performs all arithmetical calculations such as addition and multiplication & makes all logical decisions.

2. CU(Control Unit): Directs different parts of the computer to carry out instructions. It controls communication and coordination between input/output devices.

3. MU(Memory Unit): Stores data & instructions to process data

Components of CPU

DISK DRIVES

• Attached to the CPU.

• They are storage devices.

• They are housed within the computer or

in an external box.

Hard disk drive(HDD)

• Made up of several disks.

• The disks are sealed in an airtight case

to protect it from dust.

• Each disk store data.

CD Drive

• It enables us to create CD-ROMs and

audio CDs.

• We can copy and save data on CDs.

DVD drive

• It is used to save and read data on DVDs.

• We can store large amounts of data such

as films on DVDs.

USB port

• USB port is a part of system unit and is

linked to CPU.

• We can attach input/output devices and

USB flash drive to the USB port.