First, let’s play a game! What are they ?

laptop PC (personal computer) (notebook computer)

PDA (personal digital assistant)

robot

Similarity?

They’re computers in different stages.

What’s next?

i- robot (intelligent robot)

Unit 3 Computers ——reading

WHO AM I ?

Unit 3 Computers——Reading

Just have a fast reading

Find out topic sentences of each paragraph. 1. Over time I have changed quite a lot. 2. These changes only became possible as my memory improved. 3. Since the 1970s many new applications have been found for me.

Let’s have a more detailed reading!

Read Para. 1 in 2 mins and find out the development histoty of computers. I’ll give you some clues.

1642

a calculating machine, in 1642

(1822) an analytical machine, (in 1822), Charles Babbage

1936

a universal machine, in 1936, Alan Turing a huge computer, as large as a room, in 1940s a personal computer and a laptop, and used in offices and homes since the 1970s…

1940s

Latter

And latter…

an analytical machine, (in 1822)

分析机是由英国 数学家查尔斯· 巴 贝奇设计的一种 机械式通用计算 机。它的设计逻 辑却非常的先进， 是大约100年后电 子通用计算机的 先驱。

a huge computer, as large as a room, in the 1940s

ENIAC

尺寸（英尺） 30×50 电容(个) 重量（吨） 真空管(个) 30 18800 开关(个) 耗电（W） 10000 6000 150000

电阻(个)

70000

成本（1940年） $40万

Para. 2

technical words

Memory: storage or storage capacity as of a computer, disk, etc.

chip transistor

tube

network

The World Wide Web

These changes only became possible as my memory improved.

tubes transistors small chips network World Wide Web

more and more powerful!

Para. 2