丛书主编 凌云 主编 许春勤 副主编 赵林娟 丁育萍,计算机专业英语 电子教案,高等职业教育计算机技术专业贯通制教材,UNIT 1 The Evolution of Computer,UNIT 2 Computer Application,UNIT 3 CPU,UNIT 4 Computer Memory System,UNIT 5 The Introduction to Motherboard,UNIT 6 Input/Output Devices,UNIT 7 How to select a personal computer,UNIT 8 The Code System,UNIT 9 ASCII Code,UNIT 10 Boolean algebra and Set algebra,UNIT 11 Operating System,UNIT 12 The Introduction to Windows Vista,UNIT 13 Microsoft Office,UNIT 14 C Program Language,UNIT 15 What is object-oriented programming,UNIT 16 Overview of Database,UNIT 17 SQL Server 2000,UNIT 18 Multimedia,UNIT 19 Multimedia Technology,UNIT 20 The Introduction to Computer Network,UNIT 21 LAN,UNIT 22 The Introduction to ISO/OIS,UNIT 23 Internet,UNIT 24 Domain Name,UNIT 25A new kind of malicious network software- Pharming,UNIT 26 Digital Wallets,UNIT 27 Electronic Commerce,UNIT 28 Computer Viruses,UNIT 29 The common methods to deal with the viruses,UNIT 1 The Evolution of Computer,Object: 1What is computer? 2How many generations have the computers have? 3. What are the features of each generation?,This is UNIT 1 Return to main page,1.1 What is computer?,A computer is a device that accepts information (in the form of digitalized data) and manipulates it for some result based on a program or sequence of instructions on how the data is to be processed. It can accept, store, and process data and produce output results.,This is UNIT 1 Return to main page,1.2 The First Computer,The first digital computer ENIAC was invented in 1946. It contained 18,000 vacuum tubes and had a speed of several hundred multiplications per minute, but originally its program was wired into the processor and had to be manually altered. The invention of ENIAC marked the beginning of the first computer phase.,This is UNIT 1 Return to main page,1.3 Computers Four Generations,computers have had four generations, which are characterized by vacuum tubes, transistors, small and medium scale IC and very large scale integrated (VLSI) circuits respectively.,This is UNIT 1 Return to main page,First generation computers,In 1950, the first generation computers, which used vacuum tubes came out. They were large, costly to buy, expensive to power and often unreliable. But they still made great contributions to computer science, such as the concepts of stored programs, random access.,This is UNIT 1 Return to main page,Second generation computers,The use of the transistor in computers in the late 1950s marked the advent of smaller, faster, and more versatile logical elements than were possible with vacuum tube machines.,This is UNIT 1 Return to main page,Third Generation Computers,Late in the 1960s, the integrated circuit, or IC, was introduced, making it possible for many transistors to be fabricated on one silicon substrate, with interconnecting wires plated in place. The IC resulted in a further reduction in price, size, and failure rate. With IC, the computers work so quickly that they provide the capability to run more than one program concurrently.,This is UNIT 1 Return to main page,Fourth generation computers,The microprocessor became a reality in the mid-1970s with the introduction of the large scale integrated (LSI) circuit and, later, the very large scale integrated (VLSI) circuit (microchip), with many thousands of interconnected transistors etched into a single silicon substrate.,This is UNIT 1 Return to main page,Key Words,ENIAC 世界上第一台计算机，由美国国防部研究开发 digitalize v. 数字化 IC 集成电路 LSI 大规模集成电路 silicon n. 硅 VLSI 超大规模集成电路,This is UNIT 1 Return to main page,Phrases and Expressions,base on 根据，基于 come out 分解为 make contributions to 为作贡献 vacuum tube 真空管，电子管,This is UNIT 1 Return to main page,Exercises (1),1. Fill in the blanks according to the text A computer is a that accepts and manipulates it for some result based on a or sequence of on how the data is to be . It can 、 、 and data and output results. In fact, computers have had generations, which are characterized by , , , and respectively The IC resulted in a further reduction in , , and .,This is UNIT 1 Return to main page,Exercises (2),2. Decide whether each of the following statements is true or false according to the text: The computer can only accept and store data. The first digital computer ENIAC was invented in 1946. Computers have had three generations. With IC, the computers work so quickly that they provide the capability to run more than one program concurrently.,This is UNIT 1 Return to main page,UNIT 2 Computer Application,Object 1What can we do with the computer? 2What are the applications of the computer?,This is UNIT 2 Return to main page,Computer Application Our Good Friend,In the modern work, study and life, We always need our common good friend computer. We can use computer to draw up documents, manage