Do
Do, DO or D.O. may refer to:

Languages
The English verb, do, which may serve as an auxiliary verb; see do-support
Do (kana), a mora symbol in Japanese writing
Ditto mark

People
Đỗ, a Vietnamese surname
Do (surname), includes people with the surname
D.O. (entertainer) (born 1993), South Korean singer and actor
D.O. (rapper), Canadian rapper
Do (singer) (born 1981), Dutch singer
Marshall Applewhite (1931–1997), American cult leader

Music
The Dø, a French/Finnish indie pop band
Do (Do album), an album by Dutch singer Do
Do (Psychostick album)
C (musical note), the first note of the musical scale in fixed do solfège
Delta Omicron, an international music fraternity
Do, the first syllable of the scale in solfège
Do, a type of buk (drum) used in Korean ritual music
"Do", a song by the White Stripes from the 1999 album The White Stripes (album)

Science and medicine
The DO, an online magazine published by the American Osteopathic Association
Dansgaard–Oeschger event, in climate science
Delta Omega, an American public health honorary society
Doctor of Osteopathic Medicine
Dissolved oxygen

Technology
.do, the country code top level domain for the Dominican Republic
Dornier Flugzeugwerke, a defunct German aircraft manufacturer
GNOME Do, an application launcher for Linux
Dō, the torso protection in a suit of kendo armor

Places
Do (province), the Korean and Japanese administrative division equivalent to the ancient Chinese dao
Do (administrative division), an administrative unit in both North and South Korea
Do (Berkovići), Bosnia and Herzegovina
Do (Hadžići), Bosnia and Herzegovina
Do, Stolac, Bosnia and Herzegovina
Do (Trebinje), Bosnia and Herzegovina
Do, Ivory Coast
Dominican Republic

Other uses
DO (film)
Dō (philosophy), a doctrine or lifestyle in Japanese and Korean cultures
Delivery order
Denominación de origen, a Spanish wine appellation
Directorate of Operations (CIA) of the United States Central Intelligence Agency
Dominicana de Aviación, a defunct Dominican airline
Do, the number twelve in the duodecimal system

See also
D0 (disambiguation) (D followed by zero)
Doe (disambiguation)
Doo (disambiguation)
Doh (disambiguation)