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System Software Avinash Bhagat, Lovely Professional University

Notes Unit 2: Evolution of Operating System

CONTENTS

Objectives
Introduction
2.1 Evolution of Operating System
2.1.1 Operating Systems Classification
2.2 Operating System Architecture
2.2.1 Monolithic Systems
2.2.2 Layered Systems
2.2.3 Exokernel
2.2.4 Client-server Model

2.2.5 Virtual Machines
2.3 User Function of Operating System
2.3.1 Other Operating System Functions
2.3.2 Operating System Concerns
2.4 Batch Control Language
2.4.1 The Role of Graphics
2.4.2 Potential for Objects in Control

2.5 OS User Viewpoint – Facilities
2.5.1 Program Execution
2.5.2 I/O Operations
2.5.3 File System Manipulation
2.5.4 Communications
2.5.5 Error Detection
2.6 Summary
2.7 Keywords
2.8 Review Questions

2.9 Further Readings

Objectives

After studying this unit, you will be able to:
 Understand the concept of operating system
 Discuss operating system architecture
 Illustrate user function of operating system

 Understand batch control language
 Discuss operating system user facilities

14 LOVELY PROFESSIONAL UNIVERSITY