chapter05.Operating System

chapter05.Operating System - Objectives Learn what an...

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Connecting with Computer Science 2 Objectives Learn what an operating system is Become familiar with the different types of operating systems Identify the major functions of an operating system Understand how operating systems manage processes
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Connecting with Computer Science 3 Objectives (continued) Understand how operating systems manage resources Understand how operating systems provide security Learn how to perform basic operating system file management functions in Windows, UNIX, and DOS
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Connecting with Computer Science 4 Why You Need to Know About. .. Operating Systems Operating System(OS): mediates all activity within computer System knowledge improves efficiency Practical skills easily acquired Demonstrate basic folder and file functions
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Connecting with Computer Science 5 What Is an Operating System? OS: software control center Resident in main memory (RAM) Interfaces user, applications, hardware with CPU Supervises and facilitates program execution Connects hardware to CPU with device drivers Common brands: Microsoft Windows, UNIX, Linux, Mac OS
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Connecting with Computer Science 6
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Connecting with Computer Science 7 What Is an Operating System? (continued) OS has (2) main program regions Kernel: system core loaded at boot time by BIOS Modules: components provide user/device interface Platform: OS fitted to a particular CPU Cross-Platform application: runs on multiple platforms
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Connecting with Computer Science 8
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Connecting with Computer Science 9 What Is an Operating System? (continued) • Table 5-1: OS development in historical context
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Connecting with Computer Science 10
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Connecting with Computer Science 11
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Connecting with Computer Science 12 Types of Operating Systems OS classification schemes based on features and use Single-tasking; e.g., DOS and Windows 3.x Multi-tasking; e.g., Windows, Mac OS, UNIX Network Operating Systems NOS; e.g., NetWare, UNIX, Windows 2000 Server, and Windows Server 2003
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Connecting with Computer Science 13 Types of Operating Systems (continued) OS design parameters tailored to customer base Microsoft Windows and Mac OS appeal to home and small business users User-friendly interfaces and multimedia capabilities UNIX often the OS of choice in the server environment Stability, multitasking, security, multiprocessing Every multipurpose device with CPU must have an OS Desktops, clients, servers, PDAs, cell phones, appliances
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Connecting with Computer Science 14 Functions of an Operating System All operating systems perform four basic functions: Provide a user interface Manage processes Manage resources Provide security
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This note was uploaded on 12/07/2011 for the course I2C 101 taught by Professor John during the Spring '11 term at American Internation College.

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chapter05.Operating System - Objectives Learn what an...

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