Answer :
Final answer:
System software, multitasking OS, Linus Torvalds, multithreading OS, categories of system software, security measures in OS, directory structure of DOS.
Explanation:
System software is a type of software that controls and manages the hardware components of a computer system.
Multitasking operating systems allow multiple tasks or processes to run concurrently on a computer system.
Linus Torvalds wrote the original disk operating system, known as Linux.
Multithreading OS refers to an operating system that supports multiple threads within a single process.
The various categories of system software include operating systems, device drivers, utilities, and software development tools.
An operating system provides security measures such as user authentication, access control, and encryption to protect a computer system.
The directory structure of DOS organizes files hierarchically. For example, in DOS, a directory could be structured as C:\Users\Public\Documents.
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