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VIII. Discuss with your partner which sentence in b best continues the sentence in a.

A B

1. A computer a) have greater data-processing capabilities than most PCs.

2. A program b) can do the work of thousands of PCs.

3. Chips c) a device that perform automatically tasks according to a set

of instructions.

4. Programmable computers d) may include arithmetic calculations, storing, processing,

controlling and interacting.

5. Special-purpose computers e) make up a computer’s central processing unit.

6. General-purpose computers f) recognize and interpret human speech.

7. Servers g) are used in homes, schools, businesses, government offices

for every purpose.

8. Database h) perform specific tasks, their operations are limited to the

programs built in their microchips.

9. Supercomputers i) a large collection of information.

10. Digital signal processor j) design three-dimensional models on a computer screen.

11. Computer-aided design k) can accept new programs.

programs

IX. What do these numbers refer to?

30, 5, 1953, per second, 0, 2, 3.

X. Talk about computers from memory using these prompts.

device special-purpose

program general purpose

chips servers

CPU database

every purpose supercomputers

DSPs CAD

CAM

Part II

Text A

I. Read the text quickly. Match the headings (a–d) with the paragraphs (1–4):

a. Memory b. PCs and Notebooks

c. Speed d. Hardware /Software

1. The parts of a computer you can touch, such as the monitor or the Central Processing Unit (CPU) are hardware. All hardware except the CPU and the working memory are called peripherals. Computer programs are software. The operating system (OS) is software that controls the hardware. Most computers run the Microsoft Windows OS. MacOS and Linux are other operating systems.

2. The CPU controls how fast the computer processes data, or information. We measure its speed in megahertz (MHz) or gigahertz (GHz). The higher the speed of the CPU, the faster the computer will run. You can type letters and play computer games with a 500 MHz CPU. Watching movies on the Internet needs a faster CPU and a modem.

3. We measure the Random Access Memory (RAM) of the computer in megabytes (MB). RAM controls the performance of the computer when it is working and moves data to and from the CPU. Programs with a lot of graphics need a large RAM to run well. The hard disk stores data and software programs. We measure the size of the hard disk in gigabytes (GB).

4. Computer technology changes fast, but a desktop PC (Personal Computer) usually has a tower, a separate monitor, a keyboard and a mouse. The CPU, modem, CD-ROM and floppy disk drives are usually inside the tower. A notebook is a portable computer with all these components inside one small unit. Notebooks have a screen, not a monitor, and are usually more expensive than desktops with similar specifications.