Exercise 1. Answer the following questions. 1. What is an Operating System?

1. What is an Operating System?

2. What is its function?

3. What role does OS play between the user and the computer hardware? How does it work? What means does it use?

4. What are the categories of OS?

5. Describe briefly each OS category.

Exercise 2. Match English words and word combinations with their Russian equivalents.

share resources	a	универсальная операционная система
backbone of a computer	b	действовать в качестве интерфейса
memory allocation	c	без задержек
to transmit output	d	прикладной программный интерфейс
act as an interface	e	распределять ресурсы
system calls	f	постоянный ввод
application programming interface	g	суть компьютера
come in very handy	h	отвечать мгновенно
work environment	i	томографические системы
respond instantly	j	распределение памяти
consistent input	k	вызовы системных функций
without delay	l	передавать выходные данные
medical imaging system	m	оказаться весьма кстати
general-purpose OS	n	рабочая среда

Exercise 3. Match the words which are very close in their meaning.

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