DOC, initials which stand for Denominação de Origem Controlada in portugal and Denominazione di Origine Controllata in italy, those countries’ pdo denomination for superior wines.

A DOC system has also been in operation in romania since 1975.

1. Belfrage, N. ‘The Law’, Life Beyond Lambrusco—Understanding Italian Fine Wine, (London, 1985), pp 44–51.