Operational wallpaper on telephone / page 14

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Windows operating system logo on a black background

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Ubuntu icon from the Ubuntu operating system

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Military operations in the desert

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Space marines with weapons conduct military operations

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Fire plane in operation

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Planes fly home after military operations

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Blue logo of the Windows 8 operating system

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The logo of the android operating system

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Operating system manufacturer's logo

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Police operation in the lights of the night city

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The logo of the Android 4.4 operating system is red

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Schematic representation of the operating system on a green background