An oak is a tree or shrub in the genus Quercus (; Latin "oak tree"), of which about 600 species exist. "Oak" may also appear in the names of species in related genera, notably Lithocarpus. The genus is native to the northern hemisphere, and includes deciduous and evergreen species extending from cool temperate to tropical latitudes in Asia and the Americas.

Oakland International Airport , also known as Metropolitan Oakland International Airport, is a public airport located south of the central business district of Oakland, a city in Alameda County, California, United States. It is owned by the Port of Oakland. One of three international airports in the San Francisco Bay Area, airlines serving Oakland International provide service to numerous destinations in the United States, as well as Mexico. Oakland is a focus city--with the airport as a crew base and the 10th busiest—for Southwest Airlines. It is also a focus city for Allegiant Air. As of November 2011, Southwest currently has as many as 107 daily flights on peak-travel days of the week.  Alaska Airlines combined with sister-carrier Horizon Air is a distant-yet-growing 2nd busiest with as many as 11 flights.