Unit 3 Computers

keyboard mouse

monitor screen

speaker

host computer

Warming upWarming up

What do they have in common?

An abacusA 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 fo

r calculating.

2.They can deal with

maths problems.

3.They are useful and

helpful.

Discussion

the second generation (1956-1963)the second generation (1956-1963)

the third generation (1964-1971)

the fourth generation (1971- )

The first generation (1945-1956)The first generation (1945-1956)

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 1822.

10. Who was the computers’ real father?

Alan Turing.

Other useful words and expressions about computer

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