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  1. en.wikipedia.org › wiki › EmpireEmpire - Wikipedia

    23 hours ago · Definition. An empire is an aggregate of many separate states or territories under a supreme ruler or oligarchy. This is in contrast to a federation, which is an extensive state voluntarily composed of autonomous states and peoples. An empire is a large polity which rules over territories outside of its original borders.

    • Metropole

      Roman Italy, the metropole of the Roman Empire. Roman...

  2. 23 hours ago · An operating system ( OS) is system software that manages computer hardware and software resources, and provides common services for computer programs . Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time, mass storage, peripherals, and ...

  3. en.wikipedia.org › wiki › MusicMusic - Wikipedia

    23 hours ago · Music is the arrangement of sound to create some combination of form, harmony, melody, rhythm, or otherwise expressive content. [1] [2] [3] However, definitions of music vary depending on culture, [4] though it is an aspect of all human societies and a cultural universal. [5]

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