Do may refer to:
Donald John Trump (born June 14, 1946) is the 45th and current President of the United States, in office since January 20, 2017. Before entering politics, he was a businessman and television personality.
The domestic dog (Canis lupus familiaris or Canis familiaris) is a member of genus Canis (canines) that forms part of the wolf-like canids, and is the most widely abundant carnivore.
Doctor Who is a British science-fiction television programme produced by the BBC since 1963. The programme depicts the adventures of a Time Lord called "the Doctor", an extraterrestrial being from the planet Gallifrey.
The Dominican Republic (Spanish: República Dominicana [reˈpuβliˌka ðoˌminiˈkana]) is a country located in the island of Hispaniola, in the Greater Antilles archipelago of the Caribbean region.
A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin Philosophiae Doctor) is the highest academic degree awarded by universities in most countries.
Dopamine (DA, a contraction of 3,4-dihydroxyphenethylamine) is an organic chemical of the catecholamine and phenethylamine families that plays several important roles in the brain and body.