Unit 1 History of Computer/1 Unit 2 The Computer’s Components/21 Unit 3 Operating System/37 Unit 4 Database System/53 Unit 5 Programming Language/67 Unit 6 Network and Internet/81 Unit 7 Information Security /95 Unit 8 Multimedia and Computer Games/109 Unit 9 E-business/123 Unit 10 Future of Computer/135 Appendix A Specialist English and Translation Skills/151 Appendix B Screen Prompt Message/170 Appendix C Index of Basic Vocabulary/179 Appendix D Concise Explanation of Common Abbreviations/185