This document discusses the key functions and concepts of operating systems, including process management, memory management, security, and command interpretation. It covers early uniprogramming systems and the evolution to modern multiprogramming and multitasking capabilities that allow multiple processes to run concurrently by switching between them rapidly. The document examines process states and mechanisms used for process management in early systems versus modern operating systems.

2. Operating System

3. 3
Introduction

4. 4
Introduction(contd.)

5. 5
Functions of OS

6. 6
Process Management

7. 7
Process Management Mechanisms in Early Systems

8. 8
Multiprogramming

9. 9
Uniprogramming System

10. 10
Multiprogramming

11. 11
Process States in Multiprogramming

12. 12
Multitasking

13. 13
Multiprocessing

14. 14
Memory management

15. 15
Security

16. 16
Command Interpretation

17. 17
Command Interpretation