MacSTAC was founded on April 1, 1978 as an Apple II MUG. We are a community group with members from all walks of life, careers and levels of ability. We welcome all Mac users to improve their knowledge and, in turn, share their Mac knowledge with others.

Tuesday, February 17, 2009

Ever wonder that application a file is related to? Of course,
we know what .doc or .xls means and even .pdf. What about others?

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