Short for appellation d'origine contrôlée, which means "controlled designation of origin" in French. An AOC is a legislative system that indicates quality, style (usually), where the grapes were grown, and which varietals are in the bottle. For example, Burgundy's regional AOC Bourgogne Blanc denotes that the wine came from one of the 300+ parishes in the region and that it will be a dry white wine made from Chardonnay, Pinot Blanc, or Pinot Gris. Each AOC determines their own rules that qualify a wine for approval.