Facebook Skin/Facebook Layout/Facebook Theme: OSX
Mac OS X, whose “X” represents the Roman numeral for “10″ and is a prominent part of its brand identity, is a Unix-based graphical operating system,[5] built on technologies developed at NeXT between the second half of the 1980s and Apple’s purchase of the company in late 1996. Its sixth release, Mac OS X v10.5 “Leopard”, gained UNIX 03 certification while running on Intel processors
from en.wikipedia.org/wiki/Mac_OS_X
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