Appellation d'Origine Contrôlée: The French system of appellations, begun in the 1930s and considered the wine world's prototype. To carry an appellation in this system, a wine must follow rules describing the area the grapes are grown in, the varieties used, the ripeness, the alcoholic strength, the vineyard yields and the methods used in growing the grapes and making the wine.
Appellation d'Origine Protégée: This is the European Union's new designation, meant to replace the old Appellation d'Origine Contrôlée for recognition across the member states. It was officially adopted in January 2016.
A.O.C.: See Appellation d’Origine Contrôlée.
A.O.P.: See Appellation d'Origine Protégée.