1. Operating System 2 Overview

2. OPERATING SYSTEM OBJECTIVES AND FUNCTIONS

3. An OS is a program that controls the execution of application programs and acts as an interface between applications and the computer hardware. Objectives:
Convenience
Efficiency
Ability to evolve

4. Briefly, the OS typically provides services in the following areas:
Program development
Program execution
Access to I/O devices
Controlled access to files
System access
Error detection and response
Accounting

7. THE EVOLUTION OF OPERATING SYSTEMS

8. Serial Processing
Simple Batch Systems
Multiprogrammed Batch Systems
Time-Sharing Systems

12. Five major theoretical advances
1. Processes
Three major lines of computer system development created problems in timing and synchronization that contributed to the development of the concept of the process:multiprogramming batch operation, time sharing, and real-time transaction systems
problems: Improper synchronization, Failed mutual exclusion, Nondeterminate program operation, Deadlocks
2. Memory management
Process isolation
Automatic allocation and management
Support of modular programming
Long-term storage

14. Cont.. 3. Information protection and security
Availability
Confidentiality
Data integrity
Authenticity
4. Scheduling and resource management\
Fairness
Differential responsiveness
Efficiency
5. System structure

16. Different approaches on os
Microkernel architecture
Multithreading
Symmetric multiprocessing
Distributed operating systems
Object-oriented design

17. MICROSOFT WINDOWS OVERVIEW

18. TRADITIONAL UNIX SYSTEMS

20. Modern Unix & Linux

21. As UNIX evolved, the number of different implementations proliferated, each providing some useful features. There was a need to produce a new implementation that unified many of the important innovations, added other modern OS design fetures, and produced a more modular architecture.

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