![]() ![]() The types of system interface Command interface: system command (internal、external) Graphics interface: windows Programmer interface: system call, c-lib The operating system masks(隐藏) the details of the hardware from the programmer,and provides the programmer with a convenient interface for using the system. Objectives Convenience(方便) Efficiency(有效) Ability to evolve(易扩展)ĥ 1.1.2 OS as a User/Computer Interface (I)Įnd User Programmers Operating System Designer Applications Programs Utilities (Compiler, Database…) Operating System Computer Hardware Figure 2.1 Layers and Views of a Computer System Overview The Operating System as a User/Computer Interface The Operating System as Resource Manager Ease of Evolution of an Operating SystemĤ 1.1.1 Overview An operating system is a program that manages the computer, controls the execution of application programs and acts as an interface(接口) between the user of a computer and the computer hardware. ![]() Presentation on theme: "Operating System Overview"- Presentation transcript:Ģ Contents Operating System Objectives and Functions The Evolution of Operating System Major Achievements Characteristics of Modern OS Examples(NT、UNIX)
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