Do may refer to:
Donald John Trump (born June 14, 1946) is an American businessman, television personality, politician, and the 45th President of the United States.
Down syndrome (DS or DNS), also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. It is typically associated with physical growth delays, characteristic facial features and mild to moderate intellectual disability.
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 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.
The Dominican Republic (Spanish: República Dominicana [reˈpuβlika ðominiˈkana]) is a sovereign state occupying the eastern two-thirds of the island of Hispaniola, in the Greater Antilles archipelago in the Caribbean region.
A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin Philosophiae Doctor) is a type of doctoral degree awarded by universities in many countries.
Dopamine (DA, contracted from 3,4-dihydroxyphenethylamine) is an organic chemical of the catecholamine and phenethylamine families that plays several important roles in the brain and body.
The Domain Name System (DNS) is a hierarchical decentralized naming system for computers, services, or other resources connected to the Internet or a private network.
Don Quixote (/ˌdɒn kiːˈhoʊti/ or /ˌdɒn ˈkwɪksoʊt/; Spanish: [doŋ kiˈxote], formerly [doŋ kiˈʃote]), fully titled The history of the valorous and wittie Knight-Errant Don-Quixote of the Mancha (Spanish: El ingenioso hidalgo don Quixote de la Mancha [el iŋxeˈnjoso iˈðalɣo ðoŋ kiˈxote ðe la ˈmantʃa]), is a Spanish novel by Miguel de Cervantes Saavedra.