Operating Systems for IT
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An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. All computer programs, excluding firmware, require an operating system to function. - Wikipedia
Operating systems are one of the most important foundations of everything that we do in IT.
After decades of operating system competition, today two key operating system families remain in practical usage: Unix and Windows. All others have either fallen into niche usage or are only prevalent in academia. The Unix family is a vast field of many varied and independent members such as AIX, HP-UX, Solaris, RHEL, CentOS, Suse, Ubuntu, Fedora, FreeBSD, OpenBSD, NetBSD and Mac OSX. Windows only has one family member.
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