计算机专业英语Chapter007

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计算机科学与技术专业课程英译

1 计算机导论Intorduction of Computer2 高等数学Avanced Mathematics3 线性代数Linear Alberia4 离散数学Discrete Mathematics5 数值分析Numerical value Analysis6 大学英语Colleage English7 模拟电子电路Analog Electronic Circuit8 数字电子电路Digital Electronic Circuit9 软件工程Software Engineering10 信号与系统Signal and System11 多媒体技术Multimedia Technology12 操作系统Operation System13 数据结构Data Structure14 编译原理Principle of Compiling15 数据库原理Principle of Database16 信号与系统Signal and System17 计算机组成原理Constitution Principle of Computer18 计算机网络Cyber networks19 计算机图形学Cyber graphics20 人工智能Artificial Intelligence21 C＋＋语言程序设计C++ Program Design22J AVA语言程序设计Java Program Design23 ASP编程基础及应用ASP Programming Base and Application24 LINUX操作系统应用与开发Linux Operation System Application and Development25 微机原理Principle of Micro computer资源与环境经济学Economics of Natural Resources and The Environment劳动经济学Labor Economics经济学名著选读Selected Reading of the Masterpieces of Economics社会主义经济理论Socialist Economic Theory国际银行学International Banking城市经济学Urban Economics精益管理Lean Management管理学Management计算机外设原理与维修Computer Peripheral。

计算机专业英语及翻译Unit 7

Unit 7 The Fundamentals of ComputerSoftwareText 1 Data StructureA data structure is a data type. Its values are composed of component elements that are related by some structure.Since a data structure is a data type, it has a set of operations on its values. In addition, there may be operations that act on its component elements. The operations of a structured data type might not only act on the values of the data type, they might also act on component elements of the data structure.The data type’s arrays and record s are native to many programming languages. By using the pointer data type and dynamic memory allocation, many programming languages also provide the facilities for constructing linked structures. The first two higher-level abstract data types are stacks and queues. They are extremely important to computing.A stack is a data type. Its major attributes are the way the insertion and deletion of its elements. The only element that can be deleted or removed is the one that was inserted most recently. Such a structure is said to have a last-in/first-out (LIFO) behavior.Queues are familiar to us. The line of people waiting for service at a bank is an example of queues. The main feature of queues is that they follow a first-come/first-served rule. In queues, the earliest element inserted is the first served. In social settings, the rule appeals to our sense of equality and fairness.There are many applications of the first-in/first-out (FIFO) protocol of queues in computing. For example, the line of I/O requests waiting for access to a disk drive might be a queue. The line of computing jobs waiting to be run on a computer system might also be a queue.参考译文数据结构数据结构是一种数据类型，其值是由通过某种结构相互关联的组成元素所构成的。

计算机英语第二版清华第7单元

Computer Science in EnglishDesigned and Programmed ByJiang TongqiangMiao TianshunTeaching Assisted Courseware1Computer Science in EnglishChapter 7: Applications software2Chapter 7I. Pre-reading Questions1. What is applications software?Reference Key:Application software is the software designed to help you solve problems specific to business or perform specific business tasks. Application software then is the layer of software closest to you. 3Chapter 7I. Pre-reading Questions2. Are there any differences between the systems software and the applications software? Reference Key:(open)4Chapter 7I. Pre-reading Questions3. How many types of applications software do you know?Reference Key:(1) Word processingSpreadsheet applications(3) Personal finance(4) Presentation graphics(5) Database managers(6) Group collaboration(7) Desktop and personal information management(8) Integrated applications(9) Web browsers5过去分词短语designed to help you solve problems…作定语修饰the software。

计算机科学与技术专业英语

计算机科学与技术专业英语Computer Science and Technology Major计算机科学与技术专业(jìsuànjī kēxué yǔ jìshù zhuānyè) - Computer Science and Technology Major计算机科学与技术（Computer Science and Technology）是计算机科学与技术学科的核心专业，主要培养学生具有计算机科学与技术专业的基本理论、基本知识和基本技能，能够在计算机科学与技术领域从事应用与开发、设计与实施、管理与服务等工作。

Computer Science and Technology is a core major in the field of computer science and technology. It mainly focuses on cultivating students with basic theories, knowledge, and skills in computer science and technology. Graduates will be able to engage in application development, design and implementation, management, and service in the field of computer science and technology.专业课程(zhuānyè kèchéng) - Major Courses计算机科学与技术专业的课程包括但不限于以下方面：The courses of the Computer Science and Technology major include but are not limited to the following aspects:1.基础课程(basic courses):- 计算机组成原理(Computer Organization and Architecture)- 数据结构与算法(Data Structures and Algorithms)- 操作系统(Operating Systems)- 离散数学(Discrete Mathematics)- 编译原理(Compiler Design)- 计算机网络(Computer Networks)2.核心课程(core courses):- 计算机图形学(Computer Graphics)- 数据库系统(Database Systems)- 人工智能(Artificial Intelligence)- 计算机安全(Computer Security)- 软件工程(Software Engineering)- 分布式系统(Distributed Systems)3.专业选修课程(major elective courses):- 数据挖掘(Data Mining)- 机器学习(Machine Learning)- 物联网技术(Internet of Things)- 云计算(Cloud Computing)- 嵌入式系统(Embedded Systems)就业方向(jiùyè fāngxiàng) - Career Paths计算机科学与技术专业的毕业生在以下领域有广泛的就业机会: Graduates of the Computer Science and Technology major have extensive job opportunities in the following fields:- 软件开发(Software Development)- 网络安全(Network Security)- 数据分析(Data Analysis)- 人工智能与机器学习(Artificial Intelligence and Machine Learning)- 云计算与大数据(Cloud Computing and Big Data)- 嵌入式系统开发(Embedded System Development)- 网站设计与开发(Website Design and Development)- IT管理与咨询(IT Management and Consulting)以上是关于计算机科学与技术专业的简单介绍。

《计算机专业英语》谢希仁第二版-第7章讲义

Requirements:
1. The origins of the programming languages 2. The concepts of computer compilers 3. Main properties of object-orientation 4. 掌握复杂定语从句的翻译技巧
Abbreviations:
OOPL (object-oriented programming language) 面向对象的程序设计语言
7.1 Introduction to Programming Language
A programming language represents a special vocabulary and a set of grammatical rules for instructing a computer to perform specific tasks. Broadly speaking, it consists of a set of statements or expressions understandable to both people and computers.
近来出现的新的程序设计语言，像C++，微软的Visual C++， Visual Foxpro，和Visual Java，他们都支持面向对象的程序设计（OOP）技术。OOP这种程序设计要求编程人员不仅要给出数据结构中的数据类型的定义，还需要给出作用在这些数据结构之上的操作（函数，或方法）的类型。
程序设计语言是指令计算机实现某些具体任务的一套特殊词汇和一组语法规则。从广义的角度说，它包括一组既能被人所理解又能被计算机所识别的声明和表达式。

计算机专业英语Unit7

• ARPAnet • NSF • www • URL • Newsgroup • WAN • TCP/IP • SMTP • POP • NNTP
Signature encryption LAN FTP search engine C/S web page website hacker confidential data
Unit 7 Section 2 Passage A
•
The Internet, originally the ARPAnet (Advanced Research Projects Agency network), began as a military computer network in 1969. Other government agencies and universities created internal networks based on the ARPAnet model. The catalyst for the Internet today was provided by the National Science Foundation (NSF). Rather than have a physical communications connection from each institution to a supercomputing center, the NSF began a “chain” of connections in which institutions would be connected to their “neighbor” computing centers, which all tied into central supercomputing centers. This beginning expanded to a global network of computer networks, which allows computers all over the world to communicate with one another and share information stored at various computer “servers,” either on a local computer or a computer located anywhere in the world. The Internet is not governed by any official body, but there are organizations which work to make the Internet more accessible and useful.

计算机专业英语

encapsulation
The property of being a self-contained unit is called encapsulation.With encapsulation,we can accomplish data hiding.Data hiding is the highly valued characteristic that an object can be used without the user knowing or caring how it works internally.Just as you can use a refrigerator without knowing how the compressor works,you can use a well-designed object without knowing about its internal data members.
Inheritance
A QFit is a kind of Fit,but one with new features.C++ supports the idea of reuse through inheritance.A new type,which is an extension of an existing type,can be declared.This new subclass is said to derive from the existing type and is sometimes called a derived type .The QFit is derived from the Fit and thus inherits all its qualities,but can add to them as needed.

计算机专业英语(2008影印版)第七章全文翻译

第七章P181Introduction你如何获取数据到CPU？你如何获得信息？在这里，我们描述了一个最重要的地方与人的计算机接口。

我们输入文字，音乐，甚至讲话，但我们可能从来没有想过我们输入计算机进程之间的关系。

人们理解的语言，它是由字母，数字和标点符号构建。

然而，计算机可以理解只有0和1的二进制的机器语言。

输入设备基本上都是翻译。

输入设备转换数字，字母和行动的人理解成计算机能够处理的形式。

你有没有想过如何处理系统单位的信息转换成一种形式，您可以使用吗？这是输出设备的作用。

虽然输入设备转换系统单元可以处理成什么了解，转换系统的单位处理，我们可以理解成一种输出设备。

输出设备转换成字母，数字，声音，图像，人们可以理解的机器语言。

主管最终用户需要了解最常用的输入设备，包括键盘，鼠标，扫描仪，数码相机，数字化片，语音识别，和MIDI设备。

此外，他们还需要了解最常用的输出设备，包括显示器，打印机和音频输出设备。

和最终用户的需要，要注意组合的输入和输出设备，如传真机，多功能设备，互联网电话和终端。

P182What is inout?输入任何数据或由计算机使用的指令。

他们可以直接从你或从其他来源。

您提供的输入，只要您使用的系统或应用程序。

例如，当使用字处理课程一，你输入的字母和数字的形式和问题，如保存和打印文件中的数据。

所指向的项目，您还可以输入数据，并发出命令，用你的声音。

输入其他来源包括扫描或拍摄的图像。

硬件，输入设备是用来翻译，文字，声音，图像和行动的人了解该系统的单位可以处理成一种形式。

例如，使用字处理器时，您通常使用键盘输入文字和鼠标发出的命令。

除了键盘和鼠标，还有各种各样的其他输入设备。

这些措施包括指向，扫描，图像采集，数字化，音频输入设备。

Keyboard enter通过键盘输入数据，最常见的方式之一。

正如第六章所讲的，键盘转换成数字，字母和特殊字符人们理解成电信号。

这些信号发送，处理，系统单位。

计算机专业英语

2.4 Common DOS Commands(DOS常用命令) 52
2.4.1 dir(文件列表命令) 53
2.4.2 type(显示文件内容) 54
2.4.3 copy(拷贝命令) 54
2.4.4 ren(文件改名命令) 54
2.4.5 del(文件删除命令) 55
7.5.4 Fax(传真) 177
7.6 Professional Terms(专业术语) 179
Exercises(练习) 179
5.2.1 Some Common Events(常用事件) 123
5.2.2 Some Common Controls，Attributes of Controls(常用控件及其属性) 126
5.3 Java 2 128
5.3.1 Java Language Keywords(Java语言关键字) 129
4.4.2 Latest Features(最新特征) 104
4.4.3 Partion Backup and Image It(磁盘分区备份为映像文件) 105
4.4.4 Partition from image(映像文件还原为磁盘分区) 107
4.5 Situation Dialogue(情境对话) 108
3.2 Architecture of Computer Networks(计算机网络结构) 69
3.3 LAN(局域网) 72
3.4 WAN(广域网) 74
3.5 Hardware Concepts of Computer Network(计算机网络硬件设备基础) 76
3.5.1 Net Interface Card(网卡) 76

计算机专业英语Chapter007

Multiple Choice Questions1. Hard disks store and organize files using all the following, except:A. tracksB. sectorsC. cylindersD. paths2. Which of the following is true about an internal hard disk?A. Variable amount of storageB. Fixed amount of storageC. PortableD. Slow3. On a hard disk each track is divided into invisible wedge-shaped sections called:A. bitsB. plattersC. cylindersD. sectors4. The hard disk's disk surface is scratched and some or all of the data is destroyed when there is a:A. head crashB. cylinder crashC. track crashD. sector crash5. Which of the following is not an example of secondary storage?A. External hard drivesB. RAIDC. RAMD. Flash drives6. An external hard disk:A. is heavy.B. is hard to remove.C. cannot be used in addition to an internal hard disk.D. usually connects to a USB or FireWire port.7. Storage that retains its data after the power is turned off is referred to as:A. volatile storage.B. sequential storage.C. direct storage.D. nonvolatile storage.8. The process of accessing information from secondary storage devices is referred to as:A. backing up.B. restoring.C. writing.D. reading.9. The ____ of a secondary storage device indicates how much data the storage medium can hold.A. accessB. capacityC. memoryD. storage10. Which of the following measures the amount of time required by the storage device to retrieve data and programs?A. Nonvolatile mediaB. CapacityC. Access speedD. RAM11. One way to improve the storage capacity of a hard disk is to:A. format often.B. use file compression.C. increase memory.D. use disk caching.12. This process improves system performance by acting as a temporary high-speed holding area between a secondary storage device and the CPU.A. Data compressionB. Data accessC. Disk cachingD. RAID13. Which of the following characteristics about RAID is incorrect?A. expanded storage capabilityB. fast access speedC. highly reliableD. one high-capacity hard disk drive14. Three ways to improve the performance of a hard disk include:A. disk caching, RAID, and file expansion.B. file compression, disk caching, and file encryption.C. disk caching, RAID, and file compression.D. RAID, file compression and disk expansion.15. Which of these is not an example of solid state storage?A. Digital versatile discB. SSDsC. Flash memory cardsD. USB drives16. Smartphones use which of these storage technologies?A. Optical driveB. Solid state driveC. Flash memory cardD. Flash drive17. Optical discs use these to represent data.A. Analog signalsB. Magnetic chargesC. Pits and landsD. Laser beams18. A CD-RW disc:A. can be written to only once.B. can be erased and rewritten.C. cannot be written on.D. cannot be erased.19. All of the following are true of DVD-ROM drives except:A. They are also known as erasable optical discs.B. They can provide over two hours of high-quality video and sound comparable to that found in motion picture theatres.C. They are a type of optical disc.D. DVD-ROM stands for "digital versatile disc–read only memory".20. The standard for high definition optical discs is:A. DVD-RAMB. HD DVDC. Blu-rayD. HD CD21. These discs have a capacity of 50 gigabytes on one side.A. HD DVDB. CDC. DVDD. Blu-Ray22. Solid-state storage devices are different than hard disks in that they:A. have no moving parts.B. have a higher capacity.C. have greater access speed.D. are volatile.23. What is it called when servers on the Internet supply applications as a service, rather thana product?A. Digital versatile computingB. Service computingC. Cloud computingD. Optical computing24. This allows you to upload and store documents on the Internet.A. Cloud storageB. Flash driveC. Solid State storageD. Hard Disk drive25. Which of these is not a mass storage device?A. RAID systemB. File serverC. Optical discD. Organizational cloud storageTrue / False Questions26. Media are the actual physical material that holds the data and programs.True False27. The process of saving information to a secondary storage device is referred to as embedding.True False28. Secondary storage provides temporary or volatile storage.True False29. Hard disks use tracks, sectors, and cylinders to store and organize files.True False30. A smoke particle, fingerprint, dust, or human hair could cause a hard disk head crash. True False31. A hard crash typically occurs on an optical disk when it makes contact with particles on its surface.True False32. External hard drives are used primarily to complement an internal hard disk.True False33. External hard disks use different technology than internal hard disks.True False34. Disk caching improves hard-disk performance by compressing files.True False35. Disk caching uses a combination of hardware and software.True False36. RAID connects several inexpensive hard-disk drives to one another.True False37. File compression is only available on hard disk drives.True False38. CD-ROMs are often used to archive data and to record music downloaded from the Internet.True False39. DVDs have replaced CDs as the standard optical disc.True False40. Blu-ray Discs are the high definition standard and have a far greater capacity than DVDs. True False41. Facebook is an example of cloud storage.True False42. If you have used Google Docs to create a word processing document, you have used cloud computing.True False43. In order to access your documents and files that are stored in the cloud, you must have an Internet connection.True False44. Mass storage devices are specialized high-capacity secondary storage devices designed to store large amounts of data for an organization.True False45. File servers are appropriate devices to use in an enterprise storage system.True FalseFill in the Blank Questions46. _____ speed is the measure of the amount of time required by a storage device to retrieve data and programs.________________________________________47. Tracks are divided into invisible wedge-shaped sections called _____.________________________________________48. Disk _____ improves hard-disk performance by anticipating data needs and reducing time to access data from secondary storage.________________________________________49. A(n) _____ hard disk is typically connected to a USB or FireWire port.________________________________________50. A _____ occurs when a read/write head makes contact with the hard disk's surface or with particles on its surface.________________________________________51. File _____ programs scan files for ways to reduce the amount of required storage.________________________________________52. File _____ expands compressed files.________________________________________53. Due to its expanded storage capability, fast access speed, and high reliability, _____ is often used by Internet servers and large organizations.________________________________________54. USB drives are also known as _____ drives.________________________________________55. _____ memory cards are a form of a solid-state storage device widely used in smartphones, digital media players and GPS navigation systems.________________________________________56. CD-ROM is an example of a(n) _____ type of storage medium.________________________________________57. DVD + R and DVD-R both stand for DVD _____.________________________________________58. Typically a microcomputer uses an _____ hard disk to store the operating system and software applications.________________________________________59. DVD stands for digital versatile disc or digital _____ disc.________________________________________60. The hi-def standard for optical discs is the _____ Disc.________________________________________61. Three common storage options discussed in your text are hard disk, _____, and solid-state storage.________________________________________62. With _____, or online storage, you can access your files from any computer with an Internet connection.________________________________________63. A good way to share files with others is to use a ________, or online, storage service.________________________________________64. Most large organizations store data through a strategy called a(n) _____ to promote efficient and safe use of data across the networks within their organizations.________________________________________Essay Questions65. Discuss the importance and uses of secondary storage devices.66. List and explain some of the important characteristics of secondary storage.67. What causes a head crash to occur?68. Describe a RAID.69. What is solid-state storage? Give examples.70. Briefly discuss the differences between CD, DVD, and Blu-ray discs.71. Describe how file compression works. Explain the advantages of file compression.72. Describe some of the advantages and disadvantages of using cloud computing and cloud storage.73. Describe some of the mass storage devices that support an enterprise storage system.74. What is a storage area network?Multiple Choice Questions1. (p. 189) Hard disks store and organize files using all the following, except:A. tracksB. sectorsC. cylindersD. pathsAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-03Topic: Hard Disks2. (p. 190) Which of the following is true about an internal hard disk?A. Variable amount of storageB. Fixed amount of storageC. PortableD. SlowAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-04Topic: Internal Hard Disk3. (p. 189) On a hard disk each track is divided into invisible wedge-shaped sections called:A. bitsB. plattersC. cylindersD. sectorsAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-03Topic: Hard Disks4. (p. 190) The hard disk's disk surface is scratched and some or all of the data is destroyed when there is a:A. head crashB. cylinder crashC. track crashD. sector crashAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-03Topic: Hard Disks5. (p. 188) Which of the following is not an example of secondary storage?A. External hard drivesB. RAIDC. RAMD. Flash drivesAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-01Topic: Storage6. (p. 190) An external hard disk:A. is heavy.B. is hard to remove.C. cannot be used in addition to an internal hard disk.D. usually connects to a USB or FireWire port.AACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-04Topic: External Hard Drives7. (p. 188) Storage that retains its data after the power is turned off is referred to as:A. volatile storage.B. sequential storage.C. direct storage.D. nonvolatile storage.AACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-01Topic: Storage8. (p. 188-189) The process of accessing information from secondary storage devices is referred to as:A. backing up.B. restoring.C. writing.D. reading.AACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-01Topic: Storage9. (p. 189) The ____ of a secondary storage device indicates how much data the storage medium can hold.A. accessB. capacityC. memoryD. storageAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-01Topic: Storage10. (p. 189) Which of the following measures the amount of time required by the storage device to retrieve data and programs?A. Nonvolatile mediaB. CapacityC. Access speedD. RAMAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-01Topic: Storage11. (p. 190) One way to improve the storage capacity of a hard disk is to:A. format often.B. use file compression.C. increase memory.D. use disk caching.AACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-05Topic: Performance Enhancements12. (p. 190) This process improves system performance by acting as a temporary high-speed holding area between a secondary storage device and the CPU.A. Data compressionB. Data accessC. Disk cachingD. RAIDAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-05Topic: Performance Enhancements13. (p. 191) Which of the following characteristics about RAID is incorrect?A. expanded storage capabilityB. fast access speedC. highly reliableD. one high-capacity hard disk driveAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-05Topic: Redundant arrays of inexpensive disks (RAID)14. (p. 190) Three ways to improve the performance of a hard disk include:A. disk caching, RAID, and file expansion.B. file compression, disk caching, and file encryption.C. disk caching, RAID, and file compression.D. RAID, file compression and disk expansion.AACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-05Topic: Performance Enhancements15. (p. 194) Which of these is not an example of solid state storage?A. Digital versatile discB. SSDsC. Flash memory cardsD. USB drivesAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-07Topic: Solid-State Storage16. (p. 194) Smartphones use which of these storage technologies?A. Optical driveB. Solid state driveC. Flash memory cardD. Flash driveAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-07Topic: Flash Memory Cards17. (p. 192) Optical discs use these to represent data.A. Analog signalsB. Magnetic chargesC. Pits and landsD. Laser beamsAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-06Topic: Optical Discs18. (p. 193) A CD-RW disc:A. can be written to only once.B. can be erased and rewritten.C. cannot be written on.D. cannot be erased.AACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-06Topic: Compact Disc19. (p. 193) All of the following are true of DVD-ROM drives except:A. They are also known as erasable optical discs.B. They can provide over two hours of high-quality video and sound comparable to that found in motion picture theatres.C. They are a type of optical disc.D. DVD-ROM stands for "digital versatile disc–read only memory".AACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-06Topic: Digital Versatile Disc20. (p. 193) The standard for high definition optical discs is:A. DVD-RAMB. HD DVDC. Blu-rayD. HD CDAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-06Topic: Blu-ray Disc21. (p. 194) These discs have a capacity of 50 gigabytes on one side.A. HD DVDB. CDC. DVDD. Blu-RayAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-06Topic: Blu-ray Disc22. (p. 194) Solid-state storage devices are different than hard disks in that they:A. have no moving parts.B. have a higher capacity.C. have greater access speed.D. are volatile.AACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-07Topic: Solid-State Storage23. (p. 196) What is it called when servers on the Internet supply applications as a service, rather than a product?A. Digital versatile computingB. Service computingC. Cloud computingD. Optical computingAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-08Topic: Cloud storage24. (p. 196) This allows you to upload and store documents on the Internet.A. Cloud storageB. Flash driveC. Solid State storageD. Hard Disk driveAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-08Topic: Cloud storage25. (p. 199) Which of these is not a mass storage device?A. RAID systemB. File serverC. Optical discD. Organizational cloud storageAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-09Topic: Mass Storage DevicesTrue / False Questions26. (p. 189) Media are the actual physical material that holds the data and programs. TRUEAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-01Topic: Storage27. (p. 188) The process of saving information to a secondary storage device is referred to as embedding.FALSEAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-01Topic: Storage28. (p. 188) Secondary storage provides temporary or volatile storage.FALSEAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-01Topic: Storage29. (p. 189) Hard disks use tracks, sectors, and cylinders to store and organize files.TRUEAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-03Topic: Hard Disks30. (p. 190) A smoke particle, fingerprint, dust, or human hair could cause a hard disk head crash.TRUEAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-03Topic: Hard Disks31. (p. 190) A hard crash typically occurs on an optical disk when it makes contact with particles on its surface.FALSEAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-03Topic: Hard Disks32. (p. 190) External hard drives are used primarily to complement an internal hard disk. TRUEAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-04Topic: External Hard Drives33. (p. 190) External hard disks use different technology than internal hard disks.FALSEAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-04Topic: External Hard Drives34. (p. 190) Disk caching improves hard-disk performance by compressing files.FALSEAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-05Topic: Performance Enhancements35. (p. 191) Disk caching uses a combination of hardware and software.TRUEAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-05Topic: Performance Enhancements36. (p. 191) RAID connects several inexpensive hard-disk drives to one another.TRUEAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-05Topic: Performance Enhancements37. (p. 191) File compression is only available on hard disk drives.FALSEAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-05Topic: Performance Enhancements38. (p. 192) CD-ROMs are often used to archive data and to record music downloaded from the Internet.FALSEAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-06Topic: Compact Disc39. (p. 193) DVDs have replaced CDs as the standard optical disc.TRUEAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-06Topic: Digital Versatile Disc40. (p. 193) Blu-ray Discs are the high definition standard and have a far greater capacity than DVDs.TRUEAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-06Topic: Blu-ray Disc41. (p. 195-196) Facebook is an example of cloud storage.FALSEAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-08Topic: Cloud storage42. (p. 196) If you have used Google Docs to create a word processing document, you have used cloud computing.TRUEAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-08Topic: Cloud storage43. (p. 196) In order to access your documents and files that are stored in the cloud, you must have an Internet connection.TRUEAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-08Topic: Cloud storage44. (p. 199) Mass storage devices are specialized high-capacity secondary storage devices designed to store large amounts of data for an organization.TRUEAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-09Topic: Mass Storage Devices45. (p. 199) File servers are appropriate devices to use in an enterprise storage system. TRUEAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-09Topic: Mass Storage DevicesFill in the Blank Questions46. (p. 189) _____ speed is the measure of the amount of time required by a storage device to retrieve data and programs.AccessAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-01Topic: Storage47. (p. 189) Tracks are divided into invisible wedge-shaped sections called _____.sectorsAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-03Topic: Hard Disks48. (p. 190) Disk _____ improves hard-disk performance by anticipating data needs and reducing time to access data from secondary storage.cachingAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-05Topic: Performance Enhancements49. (p. 190) A(n) _____ hard disk is typically connected to a USB or FireWire port. externalAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-04Topic: External Hard Drives50. (p. 190) A _____ occurs when a read/write head makes contact with the hard disk's surface or with particles on its surface.head crashAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-03Topic: Hard Disks51. (p. 191) File _____ programs scan files for ways to reduce the amount of required storage. compressionAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-05Topic: Performance Enhancements52. (p. 191) File _____ expands compressed files.decompressionAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-05Topic: Performance Enhancements53. (p. 191) Due to its expanded storage capability, fast access speed, and high reliability, _____ is often used by Internet servers and large organizations.RAIDAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-05Topic: Performance Enhancements54. (p. 195) USB drives are also known as _____ drives.flashAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-07Topic: USB Drives55. (p. 194) _____ memory cards are a form of a solid-state storage device widely used in smartphones, digital media players and GPS navigation systems.FlashAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-07Topic: Flash Memory Cards56. (p. 192) CD-ROM is an example of a(n) _____ type of storage medium.opticalAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-06Topic: Optical Discs57. (p. 193) DVD + R and DVD-R both stand for DVD _____.recordableAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-06Topic: Digital Versatile Disc58. (p. 190) Typically a microcomputer uses an _____ hard disk to store the operating system and software applications.internalAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-04Topic: Internal Hard Disk59. (p. 193) DVD stands for digital versatile disc or digital _____ disc.videoAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-06Topic: Digital Versatile Disc60. (p. 193) The hi-def standard for optical discs is the _____ Disc.Blu-rayAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-06Topic: Blu-ray Disc61. (p. 192) Three common storage options discussed in your text are hard disk, _____, and solid-state storage.optical discAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-06Topic: Optical Discs62. (p. 196) With _____, or online storage, you can access your files from any computer with an Internet connection.cloudAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-08Topic: Cloud storage63. (p. 196) A good way to share files with others is to use a ________, or online, storage service.cloudAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-08Topic: Cloud storage64. (p. 199) Most large organizations store data through a strategy called a(n) _____ to promote efficient and safe use of data across the networks within their organizations.enterprise storage systemAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-09Topic: Enterprise Storage SystemEssay Questions65. (p. 188) Discuss the importance and uses of secondary storage devices.Secondary storage provides permanent or nonvolatile storage. Using secondary storage devices such as a hard disk drive, data and programs can be retained after the computer has been shut off.AACSB: Reflective ThinkingAACSB: TechnologyBlooms: RememberDifficulty: 2 MediumLearning Outcome: 07-01Topic: Storage66. (p. 189) List and explain some of the important characteristics of secondary storage.Some important characteristics of secondary storage include (1) Media which are the actual physical material that holds the data and programs, (2) Capacity which measures how much a particular storage medium can hold, (3) Storage devices which are the hardware that reads data and programs from storage media. Most also write to storage media and (4) Access speed which measures the amount of time required by the storage device to retrieve data and programs.AACSB: Reflective ThinkingAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-01Topic: Storage67. (p. 190) What causes a head crash to occur?A head crash occurs when a read/write head makes contact with the hard disk's surface or with particles on its surface. A head crash is a disaster for a hard disk. The disk surface is scratched and some or all of the data is destroyed. At one time, head crashes were commonplace.AACSB: Reflective ThinkingAACSB: TechnologyBlooms: RememberDifficulty: 1 EasyLearning Outcome: 07-01Topic: Storage68. (p. 191) Describe a RAID.RAID, or redundant array of inexpensive disks, improves performance by expanding external storage, improving access speed, and providing reliable storage. In a RAID, several inexpensive hard-disk drives are connected to one another. The connected hard-disk drives are related or grouped together, and the computer system interacts with the RAID system as though it were a single large-capacity drive. The result is expanded storage capability, fast access speed, and high reliability. For these reasons, RAID is often used by Internet servers and large organizationsAACSB: Reflective ThinkingAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-05Topic: Performance Enhancements69. (p. 194) What is solid-state storage? Give examples.Solid-state storage devices have no moving parts. Data and information are stored and retrieved electronically directly from these devices much as they would be from conventional computer memory. Solid-state drives (SSDs) are similar to hard disk drives, but they use solid-state memory instead of magnetic discs to store data. SSDs are faster and more durable than hard disks. SSDs also require less power, which can lead to increased battery life for laptops and mobile devices. SSDs are more expensive and generally have a lower capacity than hard disks, but this is changing as the popularity of SSDs continues to increase. SSDs are widely used for tablet PCs, such as the iPad. Flash memory cards are small solid-state storage devices used in portable devices like smartphones and GPS navigation systems. They are also used to store images from digital cameras and then to transfer the images to a personal computer. USB drives, or flash drives, are so compact they can be transported on a key ring. These drives connect to a computer's USB port to transfer files.AACSB: Reflective ThinkingAACSB: TechnologyBlooms: RememberDifficulty: 3 HardLearning Outcome: 07-07Topic: Solid-State Storage。

计算机专业英语教程7

When the queue is empty, both of these pointers point to the same location. Each time an entry is inserted, it is placed in the location pointed to by the tail pointer and then the tail pointer is adjusted to point toward the next unused location. In this manner, the tail pointer is always pointing to the first vacancy at the tail of the queue. Removing an entry from the queue involves extracting the entry pointed to by the head pointer and then adjusting the head pointer to point toward the entry that followed the removed entry.
egocentric adj.自我中心的
consumption n.消费, 消费量
side effect 副作用
migrate vi.移动, 移植; vt.使移居,环队列
envision vt.想象, 预想
bridge vt.跨接,接通
4.3 Queues
In contrast to a stack in which both insertions and deletions are performed at the same end, a queue is a list in which all insertions are performed at one end while all deletions are made at the other. We have already met this structure in relation to waiting lines, where we recognized it as being a first-in, first-out (FIFO) storage system. Actually, the concept of a queue is inherent in any system in which objects are served in the same order in which they arrive.

计算机专业英语教程(经典版)-精选文档600页

5
1.1 The Invention of the Computer
New Words & Expressions:
computerlike a. 计算机似的 electromechanical a. 机电的, 电机的
vacuum tubes 真空管
Census Bureau 人口普查局
thousands of 成千上万的
在ENIAC的研制中，一个天才的数学家Von Neuman(冯.诺伊曼)加入到 Eckert和Mauchly团队,他们一起提出了储存程序计算机的主意。这部机器被称做电子离散变量自动计算机, 或简称EDVAC,是第一部包括了计算机所有特征的机器。然而,直到1951年，它一直没有完成。
11
1.1 The Invention of the Computer
在 EDVAC 完成之前，其他一些机器建成了，它们吸收了 Eckert 、 Mauchly和Neuman设计的要素。其中一部是在英国剑桥研制的电子延迟存储自动计算机,或简称EDSAC，它在1949年5月首次运行，它可能是世界的第一台电子储存程序、通用型计算机投入运行。在美国运行的第一部计算机是二进制自动计算机,或简称BINAC,它在1949年8月投入运行。
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1.1 The Invention of the Computer
1.1.2 The UNIVAC I
Like other computing pioneers before them, Eckert and Mauchly formed a company in 1947 to develop a commercial computer. The company was called the Eckert-Mauchly Computer Corporation. Their objective was to design and build the Universal Automatic Computer or UNIVAC. Because of difficulties of getting financial support, they had to sell the company to Remington Rand in 1950. Eckert and Mauchly continued to work on the UNIVAC at Remington Rand and completed it in 1951. Known as the UNIVAC I, this machine was the first commercially available computer.

计算机专业英语key-termchapter7

Key Terms - Chapter 7access speedMeasures the amount of time required by the storage device to retrieve data and programs.Blu-ray disc (BD)A type of high-definition disc with a capacity of 25 to 50 gigabytes.capacityCapacity is how much data a particular storage medium can hold and another characteristic of secondary storage.CD (compact disc)Widely used optical disc format. It holds 650 MB (megabytes) to 1 GB (gigabyte) of data on one side of the CD.CD-R (CD-recordable)Stands for CD-recordable. This optical disc can be written to only once. After that it can be read many times without deterioration but cannot be written on or erased. Used to create custom music CDs and to archive data.CD-ROM (compact disc–read-only memory)Optical disc that allows data to be read but not recorded. Used to distribute large databases, references, and software application packages.CD-RW (compact disc–rewriteable)A reusable, optical disc that is not permanently altered when data is recorded. Used to create and edit large multimedia presentations.cloud computingData stored at a server on the Internet and available anywhere the Internet can be accessed.cylinderHard disks store and organize files using tracks, sectors, and cylinders.A cylinder runs through each track of a stack of platters. Cylinders differentiate files stored on the same track and sector of different platters.densityRefers to how tightly the bits (electromagnetic charges) can be packed next to one another on a floppy disk.disk cachingMethod of improving hard-disk performance by anticipating data needs. Frequently used data is read from the hard disk into memory (cache). When needed, data is then accessed directly from memory, which has a much faster transfer rate than from the hard disk. Increases performance by as much as 30 percent.DVD (digital versatile disc or digital video disc)Similar to CD-ROMs except that more data can be packed into the same amount of space. DVDdrives can store GB to 17 GB on a single DVD disc or 17 times the capacity of CDs.DVD playerAlso known as DVD-ROM drives. See DVD.DVD–R (DVD recordable)A DVD with a write-once format that differs slightly from the format of DVD+R. Typically used to create permanent archives for large amounts of data and to record videos.DVD+R (DVD recordable)A DVD with a write-once format that differs slightly from the format of DVD R. Typically used to create permanent archives for large amounts of data and to record videos.DVD-RAM (DVD random-access memory)A high capacity, maximum-performance disc that allows the user to read the information, write over it, and erase the data if necessary. Used like a floppy disk to copy, delete files, and run programs. It has up to 8 times the storage capacity of a CD and also can be used to read CD and DVD formats.DVD-ROM (DVD–read-only memory)Used to distribute full-length feature films with theater-quality video and sound. Also known asDVD players. Are read-only.DVD+RW / DVD-RW (DVD rewriteable)Another DVD format to record and erase repeatedly. Able to create and read CD discs along with creating and editing large-scale multimedia presentations.enterprise storage systemUsing mass storage devices, a strategy is designed for organizations to promote efficient and safe use of data across the networks within their organizations.erasable optical discOptical disc on which the disk drive can write information and also erase and rewrite information. Also known as CD-RW or compact disc rewriteable.external hard driveUses the same technology as an internal hard disk but is used primarily to complement an internal hard disk by providing additional storage. They are typically connected to a USB or FireWire port on the system unit and are easily removed.file compressionProcess of reducing the storage requirements for a file.file decompressionProcess of expanding a compressed file.file serverDedicated computer with large storage capacity providing users access to shared folders or fast storage and retrieval of information used in that business.flash driveSee USB drive.flash memory cardA solid-state storage device widely used in notebook computers. Flash memory also is used in a variety of specialized input devices to capture and transfer data to desktop computers.hard diskEnclosed disk drive containing one or more metallic disks. Hard disks use magnetic charges to record data and have large storage capacities and fast retrieval times.head crashWhen a read-write head makes contact with the hard disk’s surface or particles on its surface, the disk surface becomes scratched and some or all data is destroyed.hi def (high definition)The next generation of optical disc, which offers increased storage capacities.internal hard diskStorage device consisting of one or more metallic platters sealed inside a container. Internal hard disks are installed inside the system cabinet of a microcomputer. It stores the operating system and major applications like Word.landSee lands and pits.lands and pitsFlat and bumpy areas, respectively, that represent 1s and 0s on the optical disc surface to be read by a laser.mass storageRefers to the tremendous amount of secondary storage required by large organizations.mass storage devicesDevices such as file servers, RAID systems, tape libraries, optical jukeboxes, and more.mediaMedia are the actual physical material that holds the data, such as a floppy disk, which is one of the important characteristics of secondary storage. Singular of media is medium.network attached storage (NAS)Similar to a file server except simpler and less expensive. Widely used for home and small business storage needs.online storageProvide users with storage space that can be accessed from a Web site.optical discStorage device that can hold over 17 gigabytes of data, which is an equivalent of several million typewritten pages. Lasers are used to record and read data on the disc. The two basic types of optical discs are compact discs (CDs) and digital versatile or video discs (DVDs).organizational cloud storageHigh-speed Internet connection to a dedicated remote organizational Internet drive site.pitSee lands and pits.platterRigid metallic disk; multiple platters are stacked one on top of another within a hard disk drive.primary storageHolds data and program instructions for processing data. It also holds processed information before it is output. See memory.RAID systemSeveral inexpensive hard-disk drives connected to improve performance and provide reliable storage.redundant arrays of inexpensive disks (RAIDs)Groups of inexpensive hard-disk drives related or grouped together using networks and special software. They improve performance by expanding external storage.secondary storagePermanent storage used to preserve programs and data that can be retained after the computer is turned off. These devices include floppy disks, hard disks, magnetic tape, CDs, DVDs, and more.secondary storage deviceThese devices are used to save, backup, and transport files from one location or computer to another. See secondary storage.sectorSection shaped like a pie wedge that divides the tracks on a disk.solid-state drive (SSD)Designed to be connected inside a microcomputer system the same way an internal hard disk would be, but contains solid-state memory instead of magnetic disks to store data.solid-state storageA secondary storage device that has no moving parts. Data is stored and retrieved electronically directly from these devices, much as they would be from conventional computer memory.storage area network (SAN)An architecture that links remote computer storage devices such as enterprise storage systems to computers so that the devices are available as locally attached drives.storage deviceHardware that reads data and programs from storage media. Most also write to storage media.tape libraryDevice that provides automatic access to data archived on a large collection or library of tapes.trackClosed, concentric ring on a disk on which data is recorded. Each track is divided into sections called sectors.USB driveThe size of a key chain, these hard drives connect to a computer’s USB port enabling a transfer of files; has a capacity of up to 64GB.。

计算机专业英语课件E1Unit07

• ___1. It's not necessary for a message to be divided into discrete packages of data when travelling over a network.
• ___2. Each data package must take the same path over the network while traveling from the sending computer to the receiving computer.
______4. A networking standard for very short-range wireless connections; the devices are automatically connected once they get within the allowable range
______5. A network in which there are multiple connections between the devices on the network so that messages can take any of several possible paths
1.1 Section A: OSI Reference Model: The Driving Force behind Network Communications
• Today there are actually several versions of Ethernet, reflecting advances in technology and higher transfer rates. All, however, share common traits that characterize the Ethernet family. Among these are the format in which data are packaged for transmission, the use of Manchester encoding (a method of representing 0s and 1s in which a 0 is represented by a descending signal and a 1 is represented by an ascending signal) for the actual transmission of bits, and the use of CSMA/CD for controlling the right to transmit.

《计算机专业英语》电子教程599页PPT

vacuum tubes 真空管
Census Bureau 人口普查局
thousands of 成千上万的
known as 通常所说的，以……著称
Abbreviations:
ENIAC(Electronic Numerical Integrator and Computer) 电子数字积分计算机，ENIAC计算机 EDSAC (Electronic Delay Storage Automatic Computer) 延迟存储电子自动计算机 BINAC (Binary Automatic Computer) 二进制自动计算机
Chapter 1 The History and Future of Computers
Key points: useful terms and definitions
of computers
Difficult points: describing theof each generation
1.1 The Invention of the Computer
One of the first computerlike devices was developed in Germany by Konrad Zuse in 1941. Called the Z3, it was general-purpose, storedprogram machine with many electronic parts, but it had a mechanical memory. Another electromechanical computing machine was developed by Howard Aiken, with financial assistance from IBM, at Harvard University in 1943. It was called the Automatic Sequence Control Calculator Mark I, or simply the Harvard Mark I. Neither of these machines was a true computer, however, because they were not entirely electronic.

计算机专业英语教程(经典版)

5
1.1 The Invention of the Computer
New Words & Expressions:
computerlike a. 计算机似的 electromechanical a. 机电的, 电机的
vacuum tubes 真空管
Census Bureau 人口普查局
thousands of 成千上万的
10
1.1 The Invention of the Computer
1.1.1 The ENIAC While working on the ENIAC, Eckert and Mauchly were joined by a brilliant mathematician, John von Neuman. Together, they developed the idea of a stored program computer. This machine, called the Electronic Discrete Variable Automatic Computer, or EDVAC, was the first machine whose design included all the characteristics of a computer. It was not completed, however, until 1951.
12
1.1 The Invention of the Computer
1.1.2 The UNIVAC I
Like other computing pioneers before them, Eckert and Mauchly formed a company in 1947 to develop a commercial computer. The company was called the Eckert-Mauchly Computer Corporation. Their objective was to design and build the Universal Automatic Computer or UNIVAC. Because of difficulties of getting financial support, they had to sell the company to Remington Rand in 1950. Eckert and Mauchly continued to work on the UNIVAC at Remington Rand and completed it in 1951. Known as the UNIVAC I, this machine was the first commercially available computer.

《计算机英语》课件Chapter 7 Application Software

Application software includes a variety of programs that can be segregated into general-purpose and applicationspecific categories.
7.1 Application Software
《计算机英语》课件Chapter 7 Application Software
Chapter 7 Application Software
Objective After reading this chapter, you should be able to: Identify the system software from the application software. Discuss common features of most application software. Give some examples of commonly used application software.
Most word processors are powerful systems consisting of one or more programs that can produce any arbitrary combination of images, graphics and text, the latter handled with type-setting capability.
7.5 Spreadsheets
Spreadsheet programs organize, analyze, and graph numeric data such as budgets and financial reports.

计算机专业英语 -第7章1

Page 187
Competencies (Page 1 of 2)
Define input Describe keyboard entry, pointing devices, and scanning devices Discuss image capturing devices, including digital cameras, digital video cameras, and audio input devices
Chapter 7
Input and Output
Introduction
Do you ever wonder how information gets into your computer and comes out in a form you can use? Input devices convert what we understand into what the system unit can process. Output devices convert what the system unit has processed into a form that we can understand. Input and output devices are the focus of this chapter.
Page 186
activeactive-matrix monitor (193) A type of flatflat-panel monitor where each pixel is independently activated. (See also thin film transistor (TFT) monitor)有源矩阵显 monitor)有源矩阵显示器 bar code (187)The vertical zebra-striped zebramarks printed on product containers. bar code reader (187)Contains photoelectric cells that scan or read bar codes. (See also bar code scanner)