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2. Operating system - Wikipedia

   en.wikipedia.org/wiki/Operating_system

   The operating system provides an interface between an application program and the computer hardware, so that an application program can interact with the hardware only by obeying rules and procedures programmed into the operating system. The operating system is also a set of services which simplify development and execution of application programs.

3. List of operating systems - Wikipedia

   en.wikipedia.org/wiki/List_of_operating_systems

   This is a list of operating systems. Computer operating systems can be categorized by technology, ownership, licensing, working state, usage, and by many other ...

4. How to Find Out if You Have the Most Updated Operating System

   www.aol.com/.../blog/most-updated-operating-system

   An operating system is a software program that allows users to interact with the computer or mobile device and run applications (like Microsoft Office, Google Chrome, Facebook, etc).

5. Comparison of operating systems - Wikipedia

   en.wikipedia.org/.../Comparison_of_operating_systems

   These tables provide a comparison of operating systems, of computer devices, as listing general and technical information for a number of widely used and currently available PC or handheld (including smartphone and tablet computer) operating systems.

6. Computer - Wikipedia

   en.wikipedia.org/wiki/Computer

   The term computer system may refer to a nominally complete computer that includes the hardware, operating system, software, and peripheral equipment needed and used for full operation; or to a group of computers that are linked and function together, such as a computer network or computer cluster.

7. History of operating systems - Wikipedia

   en.wikipedia.org/wiki/History_of_operating_systems

   Early operating systems were very diverse, with each vendor or customer producing one or more operating systems specific to their particular mainframe computer. Every operating system, even from the same vendor, could have radically different models of commands, operating procedures, and such facilities as debugging aids.

8. Kernel (operating system) - Wikipedia

   en.wikipedia.org/wiki/Kernel_(operating_system)

   A kernel is a computer program at the core of a computer's operating system that always has complete control over everything in the system. The kernel is also responsible for preventing and mitigating conflicts between different processes. [ 1 ]

9. Unix - Wikipedia

   en.wikipedia.org/wiki/Unix

   This new operating system was initially without organizational backing, and also without a name. The new operating system was a single-tasking system. [17] In 1970, the group coined the name Unics for Uniplexed Information and Computing Service as a pun on Multics, which stood for Multiplexed Information and Computer Services.