Unit 3 Computers keyboardmouse monitor screen speaker host computer Warming up.

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Presentation transcript:

Unit 3 Computers

keyboardmouse monitor screen speaker host computer Warming up

What do they have in common? An abacus A calculator A desktop A notebook computer

digital camera a laptop palmtop

What’s next?

An abacus 算盘 An abacus is an old calculating machine used in China until now.

Calculator 计算器 A calculator is a new calculating machine which can solve a large number of mathematical problems.

A huge computer A huge computer is built to solve some mathematical problems. But it is too big.

PC personal computer A PC is a personal computer which can solve all kinds of problems and is used widely now.

Notebook computer A notebook computer is a kind of useful computer which can be taken conveniently like a notebook.

(What do they have in common?)  I think that…  In my opinion…  I believe that…  What’s your reason?  Why do you think so? 1.They can be used for calculating. 2.They can deal with maths problems. 3.They are useful and helpful. Discussion

the second generation ( ) the second generation ( ) the third generation ( ) the fourth generation (1971- ) The first generation ( ) The first generation ( ) The history of computers

1.What is PC? It means: personal computer. 2. What is IT?Information Technology. 3. What is CD-ROM? Compact disc read-only memory. 4. What is PDA? Personal digital assistant. 5. What is W.W.W?World wide web. 6. 科学技术 Science and technology. 7. 人工智能 Artificial intelligence. 8. 笔记本电脑 Notebook computer. Speak the following on the whole

9. Who was the first person to devise the first computer? Charles Babbage invented an analytical machine in Who was the computers’ real father? Alan Turing.

Other useful words and expressions about computer 网络站点程序病毒黑客软件硬件上传下载主页密码桌面用户名点击 network website program virus hacker software hardware upload download home page password desk top user name click