Unit 1　Introduction　1
* What is the Computer and the Internet?　1
How To Do：Improving Your Current System　7
How To Work：A Server　7
Grammar Focus：名词、代词、形容词及副词　7
Text in Chinese：计算机和因特网　11
Reading Selection : Processor　11
构词法(Ⅰ)　13
Practical Writing: 怎样写名片　14

Unit 2　System Software (Ⅰ)　16
* What is Software?　16
How To Do: Cleaning the Keyboard　20
How To Work: Channels　21
Grammar Focus：冠词、数词、连词及介词　21
Text in Chinese：系统软件　24
Reading Selection: Software　24
构词法(Ⅱ)　25
Practical Writing：留言便条和预约便条　28

Unit 3　System Software (Ⅱ)　30
* What is the Operating System?　30
How To Do ：Text Document　34
How To Work: The Video Capture Card　34
Grammar Focus: 动词时态和动词语态　34
Text in Chinese：操作系统　37
Reading Selection: MP3　37
构词法(Ⅲ)　38
Practical Writing：邀请函　41

Unit 4　Software Applications (Ⅰ)　43
* What are Software Applications?　43
How To Do：Using WinZip　47
How To Work: The Voice Recognition System　48
Grammar Focus: 非限定性动词　48
Text in Chinese：应用软件　51
Reading Selection: Programs　52
科技英语的语言特点(Ⅰ)　53
Practical Writing：咨询信　56

Unit 5　Software Applications (Ⅱ)　58
* What are Software Suites?　58
How To Do：Encrypt　62
How To Work：Internet Telephony Calls　62
Grammar Focus：虚拟语气　63
Text in Chinese：软件套装　65
Reading Selection: Online Learning　65
科技英语的语言特点(Ⅱ)　67
Practical Writing：感谢信　71

Unit 6　The System Unit　73
* What is the System Unit?　73
How To Do：A Virus　79
How To Work：MP3　80
Grammar Focus：名词性从句　80
Text in Chinese：系统装置　82
Reading Selection: Hardware on the Inside　83
科技英语的写作特点(Ⅰ)　86
Practical Writing：道歉信　88

Unit 7　Input　89
* What is Input?　89
How To Do：Printer　94
How To Work：Telephone Wiring System　95
Grammar Focus：定语从句　95
Text in Chinese：输入　97
Reading Selection: Making Connections　98
科技英语的写作特点(Ⅱ)　100
Practical Writing：简历　101

Unit 8　Output　105
* What is Output?　105
How To Do：E-mail　109
How To Work：Personal Web Pages　110
Grammar Focus：状语从句　110
Text in Chinese：输出　113
Reading Selection：The Web　113
科技英语翻译方法与技巧(Ⅰ)　115
Practical Writing：通知信　116

Unit 9　Disk　118
* What is a Disk?　118
How To Do：Shopping　122
How To Work：Register　123
Grammar Focus：主谓一致　123
Text in Chinese：磁盘　125
Reading Selection：Storage　126
科技英语翻译方法与技巧(Ⅱ)　128
Practical Writing：申请信　131

Unit 10　Network　133
* What is a Network?　133
How To Do: A Search Tool　138
How To Work：Security suites　138
Grammar Focus：倒装句及句子种类　138
Text in Chinese：网络　141
Reading Selection: A Home (Page) of Your Own　142
科技英语翻译方法与技巧(Ⅲ)　143
Practical Writing：标点符号　147

练习参考答案　　148

Supplementary Words　160
一、初级常用词汇　160
二、常用专用词组　168
三、专业缩略语　182