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5. A) Give a title to the following fragment and translate it into Russian in writing:

In 1948 due to the invention of transistors there appeared the possibility to replace vacuum tubes. The transistor occupied an important place on the way to computer development. The potential advantage of the transistor over the vacuum tube was almost as great as that of the vacuum tube over the relay. A transistor can switch flows of electricity as fast as the vacuum tubes used in the computers, but the transistors use much less power than equivalent vacuum tubes, and are considerably smaller. Transistors are less expensive and more reliable. They were mechanically rugged, had practically unlimited life and could do some jobs better than electronics tubes. Transistors were made of crystallic solid material called semiconductor.

With the transistor came the possibility of building computers with much greater complexity and speed.

b) Put different kinds of questions to the text.

6. Read the following text with the dictionary if it is necessary. Perform the tasks given below:

Computers are used by scientists to exchange ideas, to collect, manipulate, and analyse new theories and designs. Computers are also widely used in education. Personal computers users use educational means on magnetic or optical disks or get the necessary information through various telecommunication networks.

Local area networks link the computers in different offices and educational institutions.

Modems are telecommunication devices that transmit data through telephone lines. Modems link individual computers to other computers anywhere in the country or in the world.

Word processors are used by journalists and writers for their literary activity, for writing books and articles. Their works are presented on magnetic disks or transmitted through telephone lines.

Invention of computers belongs to the greatest developments of mankind. It can be compared with the invention of stream-engine at the end of the 18th century or the utilization of anomic energy.

* Answer the following questions:

- What purpose do scientists use computers for?

- In what ways are computers used in the sphere of education?

- Through what devices do modern transmit data?

- What are journalists’ and writers’ works presented on?

* Write down the corresponding verbs:

Model: acceptor – to accept

Collector – to ____________

Broadcaster – to ____________

Performer – to ____________

Supplier – to ____________

* Read and translate the combinations into Russian:

Television broadcasts __________________________

Satellite launches _____________________________

Scientific experiments _________________________

Educational means ____________________________

* Choose the proper prepositions and fill them in: of, through, to, for, by, on.

  1. Computers are widely used … scientists and businessmen to exchange information and analyse new projects.

  2. Educational means are presented … magnetic disks.

  3. Personal computer users get the necessary information … various networks.

  4. Modems transmit data … telephone lines.

  5. Word processors are used … journalists and writers … their activity.

  6. Computers belong … the most useful inventions … mankind.

Text C