Computer Operating Systems



WE HAVE COVERED SOME OF THE BASIC concepts about information systems, databases, and programming. Now in this chapter, we will summarize functions of general-purpose computer operating systems. Rather than simply provide a user’s view, we will delve into some operating systems' internal functions and data structures by examining Microsoft Windows and UNIX-based operating systems, such as Linux, FreeBSD, and MAC/OS, as reference examples. This will provide a conceptual perspective to set the stage for the chapter on host computer security in the next section. We will begin with a view into digital logic and move on to how operating systems work with computer hardware and mediate user activities.

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