what do the letters "F.A.C.S." after someones name mean?

Question

I have seen these letters behind several people's names recently, but just don't know what they stand for.

Answer 1

Fellow of the American College of Surgeons, often listed as "FACS", is a post-nominal title used to indicate that the surgeon's education and training, professional qualifications, surgical competence, and ethical conduct have passed a rigorous evaluation, and have been found to be consistent with the high standards established and demanded by said College. In order to apply for membership, a surgeon typically must be certified by a member board of the American Board of Medical Specialties.

Answer 2

Fellow of the American College of (Something).