Mac OS is the computer operating system for Apple Computer's Macintosh line of personal computers and workstations. A popular feature of its latest version, Mac OS X, is a desktop interface with some 3-D appearance characteristics.
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Headquartered in London, National Grid PLC (NYSE: NGG) is a multinational electricity and gas utility company with principal activities in the United Kingdom and Northeastern United States. The company owns and maintains the high-voltage electricity transmission network in England and Wales.