The document outlines the basic block structure of a computer, including the input unit, storage unit, output unit, and central processing unit. The input unit accepts and converts data for processing. The storage unit, including both primary and secondary storage, holds data and instructions before and after processing. The output unit presents information after processing in various formats. The central processing unit, made up of the control unit and arithmetic logic unit, acts as the computer's brain to control other units and perform arithmetic operations.

2. Welcome

3. Block Structure of
Computer

4. Outline
 Block diagram of computer
 Input Unit
 Storage Unit
 Output Unit
 Central Processing Unit
 References

5. Block Diagram of Computer
Input OutputProcessing
Input Unit Output UnitStorage
Control Unit
ALU
CPU

6. Input Unit
 Accept data and information from user.
 Convert it to a form that the computer can
understand.
 Supply the converted data to the computer system
for further processing.
 Eg: keyboard, mouse, scanner, mic, etc…

7. Storage Unit
 The storage unit of the computer holds data and instructions,
before & after processing.
 Types: Primary Storage Unit & Secondary Storage Unit
1. Primary Storage
Temporary
 Faster
Expensive
Less storage capacity

8. Storage Unit (Cont…)
 Refers to RAM
2. Secondary Storage
Permanent
 Slower than primary
 Cheaper
High storage capacity
Refers to HDD

9. Output Unit
 The output unit is used to present soft and hardcopy of information
after processing.
 Output may be a text, audio, video, etc…
 Eg: Monitor, printer, speaker, etc…

10. Central Processing Unit
 The Control unit and Arithmetic logical unit(ALU) of the computer
are together known as the Central Processing Unit (CPU).
 It is known as the Brain of the computer.
 ALU controls all the arithmetic operations, while control unit
controls the other units of the computer.
 A PC may have CPU-IC such as Intel 8088, 80286, 80386, 80486,
Celeron, Pentium, Pentium Pro, Pentium II, Pentium III, Pentium IV,
Dual Core, and AMD etc.

11. References
 http://wikieducator.org/Block_diagram_of_computer
 http://ecomputernotes.com/fundamental/introduction-to-
computer/draw-the-block-diagram-of-computer-and-explain-its-
various-components
 http://successnotes4u.blogspot.com/2012/02/differentiate-between-
characteristics.html

12. Thank You