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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NPG Short Video Series: The Sources and Effects of Growth. Negative Population Growth, Inc. (NPG) is a national nonprofit membership organization. It was founded in 1972 to educate the American public and political leaders about the devastating effects of overpopulation on our environment, resources and standard of living.