unit Computer History PPT课件

1、contents 1. Review & Vocabulary Test2. Leading-in3. Brighten Your EyesWords & Passage4. Exercises5. Talk Table 6. Homework 第1页/共16页1. Review & Vocabulary TestQ&Aa.What is the logo of Apple Inc.?b.Whats Turings role in the development of computer? What else did he do?c.Give a brief introduction of th

2、e Enigma. 第2页/共16页2. Leading-in a. Who do you think invented computer? b. What did these people contribute to the development of computer? John Von Neumann Alan Turing J. Mauchiy and P. Eckert John V. Atanasoff第3页/共16页3. Brighten Your EyesWords & PassageDevelopment of Computers Nothing epitomizes mo

3、dern life better than the computer. For better or worse, computers have infiltrated every aspect of our society. Today computers do much more than simply compute. To fully understand and appreciate the impact computers have on our lives and promises they hold for the future, it is important to under

4、stand their evolution.第4页/共16页1. First-generation Computers (1946-1959) First-generation computers were characterized by the fact that operating instructions were made-to-order for the specific task for which the computer was to be used. Each computer had a different binary-coded program called a ma

5、chine language that told it how to operate.第5页/共16页2. Second-generation Computers (1959-1964) It was the stored program and programming language that gave computers the flexibility to finally be cost effective and productive for business use. New types of careers (programmer, analysts and computer s

6、ystems expert) and the entire software industry began with second generation computers.第6页/共16页3. Third-generation Computers (1964-1971) Computers became ever smaller as more components were squeezed onto the integrated circuit (IC) chip. Another third-generation development included the use of an o

7、perating system that allowed machines to run many different programs at once with a central program.第7页/共16页4. Fourth- generation Computers (1971-Present) After the integrated circuits, the only place to go was down in size, that is, large scale integration (LSI) could fit hundreds of components ont

8、o one chip.5. Fifth-generation (Present and Beyond) Defining the fifth generation of computers is somewhat difficult because the field is in its infancy. Computers today have some attributes of fifth generation computers.第8页/共16页第9页/共16页4. ExercisesFind Information.Task I.1.Do computers today simply

9、 compute? 2.What is the binary-code that the 1st generation computer has called? 3.Which industry began with the 2nd generation computer? 4.Where is the 4th generation computers go down? 5.Why is it difficult to define the 5th generation computer?No, they dont. Machine language.Software industry.In

10、size.Because its in its infancy.第10页/共16页Task II. True or False.( ) 1. First-generation computers were characterized by the fact that operating instructions were made-to-demand for the specific task. ( ) 2. The stored program and programming language gave the second generation computers the flexibil

11、ity to finally be cost effective and productive for business use.( ) 3. Third-generation computers are the smallest of all the computers.( ) 4. Large scale integration makes computers even smaller in size.( ) 5. Computers today have no attributes of fifth generation computers.第11页/共16页ListeningTask

12、II.Listen to 5 short dialogues and choose the best answer.Scripts: 1. W: Did you buy the type of computer you wanted?M: No, I didnt. It was too expensive.Q: Why didnt the man buy the computer?2. M: Hurry up or well be late for the professors lecture.W: Dont worry. Ill be ready in a minute.Q: What ar

13、e the two speakers going to do?第12页/共16页3. W: Im so tired. I dont think I can finish the report.M: Go home now. Leave that to me.Q: What will the man do to help the woman?4. M: What do you think of the novel?W: Its very interesting. I couldnt help reading it again and again.Q: How did the woman feel about the novel?5. W: Hi, this is Mary speaking. What can I do for you?M: Id like to know when my order will be delivered.Q: What does the man want to know?第13页/共16页6. Homeworka. Recite the spellings of th