Chapterol operating system overview 2.1 Operating System Objectives and Functions 2.2 The Evolution of operating systems 2.3 Major achievements 2. 4 Developments leading to modern Operating Systems
Chapter01 Operating System Overview • 2.1 Operating System Objectives and Functions • 2.2 The Evolution of Operating Systems • 2.3 Major Achievements • 2.4 Developments Leading to Modern Operating Systems 2
2.1 Operating System objectives and Functions ·2.1.0 Introduction .2 1.1 The Operating System as a User/computer Interface 2. 1.2 The Operating System as Resource Manager 2.1.3 Ease of evolution of an operating system
2.1 Operating System Objectives and Functions • 2.1.0 Introduction • 2.1.1 The Operating System as a User/Computer Interface • 2.1.2 The Operating System as Resource Manager • 2.1.3 Ease of Evolution of an Operating System 3
2.1.0 Introduction (1/2 Operating System definition: Operating systems .a program that User controls the execution of application programs, App lication acts as an interface between applications and hardware operating System Hardware
2.1.0 Introduction (1/2) • Operating System definition: • A program that • controls the execution of application programs, • acts as an interface between applications and hardware 4
2.1.0 Introduction(2/ 2 Operating System Objectives As User/Computer Interface--Convenience/F1 Makes the computer more convenient to use AS Resource manager-- Efficiency/有效 Allows computer system resources to be used in an efficient manner · AS System Software- Ability to evolve/扩展 Permit effective development, testing, and introduction of new system functions without interfering with service
2.1.0 Introduction (2/2) • Operating System Objectives • As User/Computer Interface --Convenience/方便 • Makes the computer more convenient to use • As Resource Manager--Efficiency /有效 • Allows computer system resources to be used in an efficient manner • As System Software--Ability to evolve /扩展 • Permit effective development, testing, and introduction of new system functions without interfering with service 5
2.1 Operating System objectives and Functions 2.1.0 Introduction 2.1.1 The Operating system as a User/Computer Interface 2. 1.2 The Operating System as Resource Manager 2.1.3 Ease of evolution of an operating system
2.1 Operating System Objectives and Functions • 2.1.0 Introduction • 2.1.1 The Operating System as a User/Computer Interface • 2.1.2 The Operating System as Resource Manager • 2.1.3 Ease of Evolution of an Operating System 6