计算机专业英语

drives for general storage and transfer of data between computers and other digital products. It is a specific type of EEPROM (electrically erasable programmable read-only memory) that is erased and programmed in large blocks; in early flash the entire chip had to be erased at once.

TASK III TEXT B

Input and

Output

Figure 2.2 Input and Output Devices

attach to 使依附 layout[5leiaut] n. 布局

A computer is only useful when it is able to communicate with the external environment. When you work with the computer you feed your data and instructions through some devices to the computer. These devices are called input devices (See Figure 2.2). Similarly computer after processing, gives output through other devices called output devices (See Figure 2.2).

Input Device

Input devices are necessary to convert our information or data in to a form which can be understood by the computer.

Keyboard: This is the standard input device attached to all computers. The layout of keyboard is just like the traditional typewriter of the type QWERTY. It also contains some extra command keys and function keys. It contains a total of 101 to 104 The computer can recognise the electrical signals corresponding to the correct keys combination and processing is done accordingly.

combination[7kCmbi5neiFEn] keys. You have to press correct combination of keys to input data. n. 结合，组合

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