《计算机专业英语08-From Power-up to Shut-down Operating System课件》由会员分享，可在线阅读，更多相关《计算机专业英语08-From Power-up to Shut-down Operating System课件（15页珍藏版）》请在金锄头文库上搜索。
1、Lesson,From Power-up to Shut-down: Operating System,What are the tasks of OS? 2. How does a word processing program work?,Warm-up Exercises,chunk 组块 virtual memory 虚拟内存 interface 接口 permanently 永久地 format 格式 temporarily 临时地 instruction 指令,Words Preparation,intertwine 交织 URL (Uniform Resource Locator
2、）统一资源定位器 seamlessly 无缝地 configuration file 配置文件 boot up 启动,Words Preparation,Once loaded, the operating systems tasks fall into six broad categories: Processor management - Breaking the tasks down into manageable chunks and prioritizing them before sending to the CPU. Memory management - Coordinatin
3、g the flow of data in and out of RAM and determining when virtual memory is necessary. Device management - Providing an interface between each device connected to the computer, the CPU and applications.,将任务分解为便于管理的块,先排列优先级再发送到CPU, Storage management - Directing where data will be stored permanently
4、on hard drives and other forms of storage. Application Interface - Providing a standard communications and data exchange between software programs and the computer. User Interface - Providing a way for you to communicate and interact with the computer. You open up a word processing program and type
5、a letter, save it and then print it out. Several components work together to make this happen:,提供通信与数据交换功能, The keyboard and mouse send your input to the operating system. The operating system determines that the word-processing program is the active program and accepts your input as data for that p
6、rogram. The word-processing program determines the format that the data is in and, via the operating system, stores it temporarily in RAM. Each instruction from the word-processing program is sent by the operating system to the CPU. These instructions are intertwined with instructions from other pro
7、grams that the operating system is overseeing before being sent to the CPU.,这些指令与其他指令交织,All this time, the operating system is steadily providing display information to the graphics card, directing what will be displayed on the monitor. When you choose to save the letter, the word-processing program
8、 sends a request to the operating system, which then provides a standard window for selecting where you wish to save the information and what you want to call it. Once you have chosen the name and file path, the operating system directs the data from RAM to the appropriate storage device. ,选择文件名称与路径
9、,You click on Print. The word-processing program sends a request to the operating system, which translates the data into a format the printer understands and directs the data from RAM to the appropriate port for the printer you requested. You open up a Web browser and check out a URL. Once again, th
10、e operating system coordinates all of the action. This time, though, the computer receives input from another source, the Internet, as well as from you. The operating system seamlessly integrates all incoming and outgoing information.,成所有向内与向外信息,You close the Web browser and choose the Shut Down opt
11、ion. The operating system closes all programs that are currently active. If a program has unsaved information, you are given an opportunity to save it before closing the program. The operating system writes its current settings to a special configuration file so that it will boot up next time with t
12、he same settings. If the computer provides software control of power, then the operating system will completely turn off the computer when it finishes its own shut-down cycle. Otherwise, you will have to manually turn the power off.,特殊配置文件,手工切断电源,Numbers, characters, images, or other method of recor
13、ding, in a form which can be assessed by a human or (especially) input into a computer, stored and processed there, or transmitted on some digital channel. Computers nearly always represent data in binary. Data on its own has no meaning, only when interpreted by some kind of data processing system d
14、oes it take on meaning and become information. People or computers can find patterns in data to perceive information, and information can be used to enhance knowledge. Since knowledge is prerequisite to wisdom, we always want more data and information. But, as modern societies verge on information o
15、verload, we especially need better ways to find patterns. 1234567.89 is data. Your bank balance has jumped 8087% to $1234567.89 is information. Nobody owes me that much money is knowledge. Id better talk to the bank before I spend it, because of what has happened to other people is wisdom.,Data,Ques
16、tions,What are the six tasks of OS? How does a word processing program work? How does a computer save and print a letter? What does URL mean? How to shut down a computer?,Translate the following sentences into Chinese,Once loaded, the OSs tasks fall into six broad categories. Several components work together to make the word processing happen. You open up a Web browser and Check out a URL. If a program has unsaved information, you are required to save it before closing the program. The OS w
