In 1963, the first official Italian system of classification of wines was launched. Since then, several modifications and additions to the legislation have been made (a major one in 1992), the last of which, in 2010, has established four basic categories, which are consistent with the last EU regulation in matter of wine (2008–09). The categories, from the bottom level to the top one, are:

Vini (Wines – informally called ‘generic wines’): These are wines that can be produced anywhere in the territory of the EU; no indication of geographical origin, of the grape varieties used, or of the vintage is allowed on the label. (The label only reports the color of the wine.)
Vini Varietali (Varietal Wines): These are generic wines that are made either mostly (at least 85%) from one kind of authorized ‘international’ grapes (Cabernet Franc, Cabernet Sauvignon, Chardonnay, Merlot, Sauvignon blanc, Syrah) or entirely from two or more of them. The grape(s) and the vintage can be indicated on the label. (The prohibition to indicate the geographical origin is instead maintained. These wines can be produced anywhere in the territory of the EU.)
Vini IGP (Wines with Protected Geographical Indication): This category (also traditionally implemented in Italy as IGT – Typical Geographical Indication) is reserved to wines produced in a specific territory within Italy and following a series of specific and precise regulations on authorized varieties, viticultural and vinification practices, organoleptic and chemico-physical characteristics, labeling instructions, etc. Currently (2016) there exist 118 IGPs/IGTs.
Vini DOP (Wines with Protected Designation of Origin): This category includes two sub-categories, i.e. Vini DOC (Controlled Designation of Origin) and Vini DOCG (Controlled and Guaranteed Designation of Origin). DOC wines must have been IGP wines for at least 5 years. They generally come from smaller regions, within a certain IGP territory, that are particularly vocated for their climatic and geological characteristics and for the quality and originality of the local winemaking traditions. They also must follow stricter production regulations than IGP wines. A DOC wine can be promoted to DOCG if it has been a DOC for at least 10 years. In addition to fulfilling the requisites for DOC wines (since that’s the category they come from), before commercialization DOCG wines must pass stricter analyses, including a tasting by a specifically appointed committee. DOCG wines have also demonstrated a superior commercial success. Currently (2016) there exist 332 DOCs and 73 DOCGs for a total of 405 DOPs.
A number of sub-categories also exist regulating the production of sparkling wines (e.g. Vino Spumante, Vino Spumante di Qualità, Vino Spumante di Qualità di Tipo Aromatico, Vino Frizzante).

Within the DOP category, ‘Classico’ is a wine produced in the historically oldest part of the protected territory. ‘Superiore’ is a wine with at least 0.5 more alc%/vol than its correspondent regular DOP wine and produced using a smaller allowed quantity of grapes per hectare, generally yielding a higher quality. ‘Riserva‘ is a wine that has been aged for a minimum period of time, depending on the typology (red, white, Traditional-method sparkling, Charmat-method sparkling). Sometimes, ‘Classico‘ or ‘Superiore‘ are themselves part of the name of the DOP (e.g. Chianti Classico DOCG or Soave Superiore DOCG).

The Italian Ministry of Agriculture (MIPAAF) regularly publishes updates to the official classification.