cpu, its components and disk drives

2. 4

3. • 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

8. CPU is housed on a single chip called
microprocessor.
It is located in system unit.

10. • 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

11. Components of CPU

13. • Attached to the CPU.
• They are storage devices.
• They are housed within the computer or
in an external box.

16. • Made up of several disks.
• The disks are sealed in an airtight case
to protect it from dust.
• Each disk store data.

18. • It enables us to create CD-ROMs and
audio CDs.
• We can copy and save data on CDs.

20. • It is used to save and read data on DVDs.
• We can store large amounts of data such
as films on DVDs.

22. • 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.