DO may refer to:

• Dominican Republic, ISO country code: do
  • .do, the country code top level domain (ccTLD) for Dominican Republic
• IATA airline code for Dominicana de Aviación, an airline of the Dominican Republic in 1944–1995
• IATA airline code for Air Vallée

Do may refer to:

• The English verb do, which may serve as an auxiliary verb; see do-support 
• Do (province) or circuit , the Korean and Japanese administrative division equivalent to the ancient Chinese dao
• Do , a Korean noun for island, as in Jejudo
• Do (philosophy), a doctrine or lifestyle in Japanese and Korean cultures
• 'do, a slang term for hairstyle (via "hairdo")
• Do (kana), a mora symbol in Japanese writing
• Do, prefix for Dornier Flugzeugwerke aircraft
• Do , the torso protection in a suit of kendo armor
• .do, the Dominican Republic's internet domain
• Do. or ditto marks
• Doctor of Osteopathic Medicine
• GNOME Do, an application launcher for Linux

Doctor of Osteopathic Medicine (D.O. or DO) is a professional doctoral degree for physicians and surgeons offered by medical schools in the United States. Holders of the D.O. degree have the ability to become licensed as osteopathic physicians who have equivalent rights, privileges, and responsibilities as physicians with a Doctor of Medicine degree (M.D.). D.O. physicians are licensed to practice the full scope of medicine and surgery in 65 countries, including all 50 states in the US, and make up seven percent of the total U.S. physician population. In 2015, there were more than 96,000 osteopathic medical physicians in the United States.

DO may refer to:

• Dominican Republic, ISO country code: do
  • .do, the country code top level domain (ccTLD) for Dominican Republic
• IATA airline code for Dominicana de Aviación, an airline of the Dominican Republic in 1944–1995
• IATA airline code for Air Vallée

Do may refer to:

• The English verb do, which may serve as an auxiliary verb; see do-support 
• Do (province) or circuit , the Korean and Japanese administrative division equivalent to the ancient Chinese dao
• Do , a Korean noun for island, as in Jejudo
• Do (philosophy), a doctrine or lifestyle in Japanese and Korean cultures
• 'do, a slang term for hairstyle (via "hairdo")
• Do (kana), a mora symbol in Japanese writing
• Do, prefix for Dornier Flugzeugwerke aircraft
• Do , the torso protection in a suit of kendo armor
• .do, the Dominican Republic's internet domain
• Do. or ditto marks
• Doctor of Osteopathic Medicine
• GNOME Do, an application launcher for Linux

Doctor of Osteopathic Medicine (D.O. or DO) is a professional doctoral degree for physicians and surgeons offered by medical schools in the United States. Holders of the D.O. degree have the ability to become licensed as osteopathic physicians who have equivalent rights, privileges, and responsibilities as physicians with a Doctor of Medicine degree (M.D.). D.O. physicians are licensed to practice the full scope of medicine and surgery in 65 countries, including all 50 states in the US, and make up seven percent of the total U.S. physician population. In 2015, there were more than 96,000 osteopathic medical physicians in the United States.