The word oak can refer to:

• An oak tree, genus Quercus.
• The Australian tree known as she-oak or desert-oak is unrelated, and instead belongs to the genus Allocasuarina.
• The American plant known as poison-oak is also unrelated, belonging to the genus Toxicodendron.

• The town of Oak, Nebraska, USA.
• The village of Oak Tree, County Durham, in England.

• Professor Oak, the first featured professor of the animé series Pokemon and the leading professor of the Kanto region.

• OAK is also the three-letter IATA airport code for Oakland International Airport in Oakland, California USA.

• In computer science Oak is a programming language by Sun Microsystems, it later evolved into the Java programming language.

• Quercus is the name of Kim Lloyd's talented chihuahua; while small in stature, Quercus is strong like the Mighty Oak.

Oak (ujednoznacznienie)