1. Arts and entertainment
    Music  Albums  Songs  Other media 

2. People

3. Science and technology
    Chemistry  Other uses in science and technology 

4. Transportation

5. Other uses

Oh, OH or Oh! is an interjection, proclaiming surprise (emotion). It may refer to:

Arts and entertainment

Music

Albums

• Oh! (Girls' Generation album), 2010
• Oh! (ScoLoHoFo album), 2003
• Oh!, an EP that came with the preorders of Oh! Gravity. by Switchfoot, 2006

Songs

• "O (Oh!)", 1920 by Ted Lewis, 1953 by Pee Wee Hunt
• "Oh" (Ciara song), 2005
• "Oh!" (Girls' Generation song), 2010
• "Oh!" (Pink Lady song), 1981
• "Oh!", by Boys Noize from Oi Oi Oi
• "Oh!", by The Breeders from Pod
• "Oh", by Dave Matthews from Some Devil
• "Oh", by Fugazi from The Argument
• "Oh", by Juliana Hatfield from Made in China
• "Oh!", by Micky Green from White T-Shirt
• "Oh!", by Sleater-Kinney from One Beat

Other media

• Oh! (TV channel), an Australian cable TV channel owned by Optus Television
• Oxygen, an American TV channel formerly called "Oh!"
• Oh, a Boov alien from Home (2015)

People

• Oh (surname), Korean and Japanese surnames romanized as "Oh" or "O"
• Ou (surname), Chinese and Cantonese surnames pronounced as "Oh" or "O"
• Dennis Oh, Korean actor
• Nadia Oh, English vocalist

Science and technology

Chemistry

• OH, hydroxyl functional group
• OH⁻, hydroxide
• ^•OH, hydroxyl radical
• OH, the functional alcohol group in a molecule

Other uses in science and technology

• OH, prefix of hominid fossils found at Olduvai Gorge
• OH, designation in the Unified Soil Classification System for organic-rich clay or silt of high plasticity
• O_h, the point group of octahedral molecular geometry
• Ohnesorge number, a dimensionless number that relates the viscous forces to inertial and surface tension forces
• Oral hygiene

Transportation

• OH, registration prefix for aircraft registered in Finland
• Comair (IATA airline code OH)
• PSA Airlines (IATA airline code OH)
• Observation helicopter, in military abbreviation

Other uses

• Ohio, US (postal abbreviation)

• Henry Lyons (disambiguation)
• Henry Lyte (botanist)
• Henry Lyte (disambiguation)
• Henry Lyttelton
• Henry López Báez
• Henry Machin
• Henry MacKeen
• Henry Mackenzie (bishop)
• Henry Mackenzie Green
• Henry MacKinnon
• Henry MacMahon
• Henry MacManus
• Henry MacShane O'Neill
• Henry Madden Library
• Henry Maddocks
• Henry Maddocks (disambiguation)
• Henry Maddocks (politician)
• Henry Maddocks (RAF officer)
• Henry Maden
• Henry Madin
• Henry Madsen
• Henry Madzorera
• Henry Magee Horricks
• Henry Mainwaring
• Henry Majendie