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Chapter08 - Discovering Computers 2009 Chapter 8 Operating...

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Discovering Computers 2009 Chapter 8 Operating Systems and Utility Programs
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Chapter 8 Objectives Identify the types of system software Summarize the startup process on a personal computer Discuss ways that some operating systems help administrators control a network and administer security Explain the purpose of the utilities included with most operating systems Summarize the features of several stand-alone operating systems Identify various network operating systems Identify devices that use several embedded operating systems Explain the purpose of several stand-alone utility programs Next Describe the functions of an operating system
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System Software What is system software ? Next p. 398 - 399 Operating system (OS) (sometimes called the platform) coordinates all activities among computer hardware resources Programs that control or maintain operation of computer Two types are operating systems and utility programs
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Operating Systems What are the functions of an operating system ? Next p. 398 - 399 Fig. 8- 1
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Operating Systems What is a cross-platform application? Next p. 399 Operating System/ Platform A Operating System/ Platform B Operating System/ Platform C Operating System/ Platform D Application Ø Runs the same on multiple operating systems
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Operating System Functions What is booting ? Next p. 400 Fig. 8-2 § Cold boot Turning on computer that has been powered off § Warm boot Restarting computer that is powered on Ø Process of starting or restarting a computer
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Operating System Functions How does a personal computer boot up? Next p. 400 - 401 Fig. 8- 3 Step 1. Power supply sends signal to com- ponents in system unit Step 4. Results of POST are compared with data in CMOS chip Step 2. Processor accesses BIOS to start computer Step 3. BIOS runs tests, called the POST, to check components such as mouse, keyboard, and adapter cards Step 5. BIOS looks for system files on a USB flash drive or CD/DVD drive, and then drive C (hard disk) Step 6. Kernel (core) of operating system loads into RAM Step 7. Operating system loads configuration information and displays desktop on screen Click to view Web Link, click Chapter 8, Click Web Link from left navigation, then click Windows Registry below Chapter 8
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Operating System Functions What is a boot disk ? Next p. 402 Ø Contains system files that will start computer when computer cannot boot § Also called recovery disk
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Operating System Functions What is a user interface ? Next p. 402 Fig. 8-4 Ø Controls how you enter data and instructions and how information displays on screen
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Operating System Functions What is a graphical user interface (GUI)? Next p. 403 Fig. 8-5a and 8- 5b Ø User interacts with menus and visual images such as buttons and other graphical objects Ø Basic Interface Ø Windows Aero Interface
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§ Foreground contains program you are using § Background contains programs that are running but are not in use Operating System Functions What is single user/ multitasking?
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