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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.