第3章 System Software ( II ),本章要点 What is the Operating System? Words and Expressions How To Do ：Text Document How To Work: The Video Capture Card Grammar Focus: 动词时态和动词语态 Text in Chinese：操作系统 Reading Selection: MP3 构词法（） Practical Writing：邀请函,What is the Operating System?,The operating system is the most important system software. Every computer has an operating system that performs three basic functions: Firstly, managing the computers resources (including the keyboard, the mouse, the printer, the monitor, the storage devices, and the memory),* Secondly, providing a user interface, for instance, a window-like graphic user interface, in order for the user to interact with application programs and hardware devices, Thirdly, loading and running application programs. Basically, the operating system is categorized into three types: embedded, network, and stand-alone operating systems (See Figure 3-1). Figure 3-1 The embedded operating system is used on handheld computers, like PDAs. This operating system is stored within the ROM memory. Some popular embedded operating systems are Windows CE and Palm OS.,What is the Operating System?,Figure 3-1,Figure 3-2,What is the Operating System?,Figure 3-2 The network operating system is designed to control the computers that are linked together via a network. This operating system is typically located on the hard disk of one of the linked computers. Called the network server, this very computer coordinates all communications between the other linked computers. Some popular network operating systems are NetWare, Windows NT Server, Windows XP Server, and UNIX (See Figure 3-2). Stand-alone operating systems, also called desktop operating systems, are located on the desktop and notebook computers hard disks to control the computer operations. Popular desktop operating systems include Windows, Mac OS, and UNIX. By far the most popular micro-computer operating system is Microsofts Windows. Windows is custom-made to run with Intel CPU and Intel-compatible CPUs, such as the Pentium (Figure 3-3). It comes in a variety of different versions, such as Windows 98, Windows 2000 Professional, and Windows XP.,What is the Operating System?,Notes: “Secondly, providing a user interface, for instance, a window-like graphic user interface, in order for the users to interact with application programs and hardware devices，” 这一部分中, for instance, a window-like graphic user interface 举例了视窗用户界面，用户界面的功能是使用户能够同应用程序及硬件设备交互作用。 Choose the best answer to each question with the information from the passage. 1Why is the operating system very important system software? AThe operating system enables the user to edit files, draw graphics, surf the Internet and do every thing possible with a computer. BThe operating system can be installed in the computer system unit to assist the management of the system. CThe operating system makes it possible for the computer to function normally and operate software applications. DThe operating system is designed to drive different hardware essentials to work properly.,What is the Operating System?,2From your understanding about the operating system which of the following expressions is true? AThe Windows operating system is compatible to different types of micro-computers. BThere are different types of operating system designed to fit desktop, notebook and palm computers. CNetwork operating system does not only control the network function but also replaces the desktop operating system to control the computer. DThe Windows operating system can run with various CPUs such as Pentium CPUs by Intel. 3The operating system was originally designed to run on computers in network. AWindows BMac OS CUNIX DPalm OS,What is the Operating System?,4Where are the three types of operating systems stored ? AThe embedded operating system is stored in PDAs RAM. BThe network operating system is stored in the computers memory. CThe desktop operating system is stored in the computers hard disk. DThe three operating system types can be stored either in the computers memory or hard disk. 5The Windows operating system is especially designed to match . Aany kind of microprocessor BIntel and Intel-compatible microprocessors Cdesktop microprocessors DMicrosofts microprocessors Fill in the blanks with the words given below. Change the form when necessary.,What is the Operating System?,Complete the following sentences with the phrases or expressions given below. Change the form when necessary. such as be used load with 1In spring, lots of different flowers are blooming in our campus, carnations, peach flowers, and lilacs. 2In our company, most computers to do accounts. 3When a computer too many software applications it will greatly slow down its running speed. Match each numbered item with the most closely related lettered item by drawing a line matching items.,W