Do and DO may refer to:
Denominación de Origen (DO), a Spanish wine appellationDirectorate of Operations (DO) of the
National Clandestine ServiceDoctor of Osteopathic Medicine (D.O. or DO), one of two degrees held by physicians in the United States
Dominican Republic (ISO country code: do)
Dissolved Oxygen, a measure of oxygen saturation in a medium
Delta Omicron (DO), an international music fraternity1xEV-DO (
Evolution-Data Optimized), a wireless radio broadband data standard adopted by many CDMA mobile phone service providers
D/O, a delivery order,The first note of the
musical scale in
solfege; see also
musical notation.Diffractive Optics, a lens design used on Canon EF lenses to reduce chromatic aberrations and weight
Dominicana de Aviación (IATA code: DO), the national and international airline of the Dominican Republic from 1944-1995
Dornier Flugzeugwerke (Do) aircraftA
prosign for Morse CodeMarshall Applewhite, nicknamed Do, the leader of the Heaven's Gate cult
Deodorant
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