11.
The MS-DOS operating system is a .....

12.
Which of the following was an early desktop operating system that included an integrated graphic user interface with point-and-click features?

13.
The most recent version of the Mac OS is based on the ......... operating system.

14.
The ............ operating system was initially created in the early 1970s at AT & T Bell Labs.

15.
The essential difference between an operating system like Linux and one like Windows is that

16.
Which of the following is NOT an advantage of open-source operating systems over proprietary versions?

17.
Use of icons and windows are characteristic of a .......... interface.

18.
The main purpose of the offline device is.......

19.
The ability of an operating system to control the activities of multiple programs at the same time is called .........

20.
A computer assisted method for the recording and analyzing of existing hypothetical systems is known as