A33, A 33 or A-33 may refer to : * Douglas A-33, a 1941 American ground-attack fighter aircraft * Excelsior tank, A33 Excelsior British heavy tank prototype * HLA-A33, a human serotype * Samsung Galaxy A33 5G, an Android smartphone and also : * One of the ''Encyclopaedia of Chess Openings'' codes for the English Opening in chess

Roads

* A33 road (England), a road connecting Reading and Southampton * A33 motorway (France), a road connecting Nancy and Dombasle-sur-Meurthe * A 33 motorway (Germany), a road connecting the A 30 in the north and the A 44 in the south * A33 motorway (Italy), a road under construction connecting Asti and Cuneo * A33 motorway (Spain), a proposed road in Murcia connecting Cieza and Font de la Figuera * A33 road (Sri Lanka), a road connecting Ja Ela-Ekala-Gampaha-Yakkala * A33 road (Botswana), a road in Botswana. {{Letter-NumberCombDisambig