Page 21 - DCAP403_Operating System

Operating System Pooja Gupta, Lovely Professional University

Notes Unit 2: Operation and Function of Operating System

CONTENTS

Objectives
Introduction
2.1 Operations and Functions of OS
2.2 Types of Operating System

2.3 Operating System: Examples
2.3.1 Disk Operating System (DOS)
2.3.2 UNIX
2.3.3 Windows
2.3.4 Macintosh
2.4 Summary

2.5 Keywords
2.6 Self Assessment
2.7 Review Questions
2.8 Further Readings

Objectives

After studying this unit, you will be able to:
Describe operations and functions of operating system
Explain various types of operating system

Introduction

The primary objective of operating system is to increase productivity of a processing resource,
such as computer hardware or computer-system users. User convenience and productivity were
secondary considerations. At the other end of the spectrum, an OS may be designed for a personal
computer costing a few thousand dollars and serving a single user whose salary is high. In this
case, it is the user whose productivity is to be increased as much as possible, with the hardware
utilization being of much less concern. In single-user systems, the emphasis is on making the
computer system easier to use by providing a graphical and hopefully more intuitively obvious
user interface.

2.1 Operations and Functions of OS

The main operations and functions of an operating system are as follows:
1. Process Management

2. Memory Management
3. Secondary Storage Management
4. I/O Management

14 LOVELY PROFESSIONAL UNIVERSITY