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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PPG Architectural Finishes, Inc. (PPG) is headquartered in Pittsburgh, Pennsylvania. A subsidiary of PPG Industries, Inc., it does business under its own name, as well as under the names PPG, Pittsburgh Paints, Porter Paints, Pure Performance Paints and Olympic stain.