CBSE Grade 11 - Computer Science Reference - Sumita Arora book for grade 11 (page 333) , images from internet.

1. Computer System Overview
Grade XI – Computer science
Teacher – Sumedha Deshpande

2. Introduction
Computer
System
Hardware Software
Input
Unit
Output
Unit
Storage
Unit

3. Input / Output Unit
Input Unit
• An input unit takes the input and
converts it into binary form so that it can
be understood by the computer.
Output Unit
• Output unit converts the output in binary form
to human readable form.
Sr. No. Input Data Instruction
1. Add 2 and 3 2,3 Add
2. Print “Hello World” “HelloWorld” Print

4. The CPU – Central Processing unit
ALU – Arithmetic Logic Unit
• ALU performs arithmetic and logical
operations.
• Result is sent back to the memory
after processing
Registers
• Small units of data holding places used
to hold some important information
during processing

5. The CPU – Central Processing unit
CU – Control Unit
Controls and guides interpretation,
flow and manipulation of all data and
information.
Memory

6. Computer Memory

7. Computer Memory- RAM/ROM

8. The Storage Unit

9. The Storage Unit

10. The Storage Unit

11. Mobile Organization

12. Types of software
Software
System
Software
OS
Language
Processor
Application
Software
Packages Utilities
s/w
Libraries

13. Working hierarchy in computer