Unit 9 Online Communication 1
Unit 10 Multimedia Technology 28
Unit 11 Artificial Intelligence 54
Unit 12 IT Products 82
Unit 13 Electronic Commerce 112
Unit 14 IT Industry 136
Unit 15 Future of IT 165
Unit 16 IT Job-hunting 192
附录一 IT常用专业术语（2000） 222
附录二 IT常用缩略词 243