VIII. Say whether you agree or disagree with the following statements. Give your reason.

SENTENCES	TRUE	FALSE	CORRECTION
When computers were first introduced in 40’s and 50’s programmers had to write programs to instruct CD-ROMs, laser printers and scanners.
The operating systems control and manage the use of the hardware and the memory usage.
There are no commands available in operating systems, only word processors.
Microsoft developed MS-DOS to compete with IBM’s PC-DOS.
NT requires computers with 486 CPU and 16 Mb of random access memory.
OS/2 is DOS compatible because it was developed by Microsoft.
Traditionally, UNIX was run by many users simultaneously.
Windows XP and Windows 7 are DOS compatible and have very “friendly” and convenient interface.

IX. Complete the sentences and find the continuation.

The operating system provides OS/2 provides UNIX allows		a graphical user interface several of its own commands multiple users to access the system
	and simultaneously to run the programs they desire that help you to use the computer that lets you run programs with a click of a mouse

X. Fill in the gaps

UNIX DOS NT OS/2 Windows 2000 XP

1. Like NT, _______ is DOS compatible and provides a graphical user interface that lets you run programs with a click of a mouse.

2. ________ is the most commonly used PC operating system.

3. ________ is a multi-user operating system that allows multiple users to access the system.

4. ________ is an operating system developed by Microsoft, an enhanced version of the popular Microsoft Windows programs.

5. The usage of ______ is so simple that even little kids learn how to use it very quickly.

XI. Make the right choice

1. Interface is an electric ______ linking one device, especially a computer, with another.

a) power c) system

b) lamp d) circuit

2. Operating system is the set of________ that controls the overall operation of a computer system typically by performing such tasks as memory allocation, job scheduling and input/ output control.

a) programs c) software

b) hardware d) instructions

3. UNIX is found on mainframes and workstations in corporate installations, as it supports _______ .

a) students c) people

b) multi-users d) specialists

4. The usage of Windows family is designed by ____ and used on most PCs.

a) Macintosh c) Apple

b) Microsoft d) IBM

5. The usage of Windows XP is ______ .

a) difficult c) simple

b) time-consuming d) limited