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2.3 Ответе на вопросы по тексту.

1 How many mainframes did IBM think it was possible to sell in 1952?

2 How many PCs have now been sold?

3 Who paid for the initial research into PCs?

4 Which company later used the results of this research to develop their operating system?

  1. What are command-based operating systems?

  2. DR/DOS is an acronym. What does it stand for?

  3. Since the invention of the IBM PC, many of its features have been improved. Which of the following features does the text not mention in this respect?

а memory b speed с size d cost

8 Give three examples from the text of how the availability of computers has ‘in all probability changed the world for ever’.