Oi

Oi or OI may refer to:

In biology

• Great-winged petrel, also known by its Māori name oi
• Orthostatic intolerance, a disorder of the autonomic nervous system
• Osteogenesis imperfecta, a genetic bone disorder

In business

• Oi (telecommunications), the largest landline telephone company in Brazil
• Operational intelligence, in business analytics
• Organizational intelligence, in business management
• Owens-Illinois, a Fortune 500 company

In linguistics

• Oi (digraph), a Latin-script digraph
• Oi (interjection), an interjection used to get someone's attention, or to express surprise or disapproval
• Oi language, a Mon–Khmer dialect cluster of southern Laos

In music

• Oi!, a subgenre of punk rock
• "Oi!", a 2002 hit song for British grime music crew More Fire Crew
• Oi Oi Oi (album), an album by Boys Noize

Organisations

• Oi! (Hong Kong), a visual arts organisation in Hong Kong
• Oriental Institute (disambiguation)
• Orphans International, a global charitable organization the benefits orphans and abandoned children

Other uses

• O-I, a Japanese tank design of the Second World War
• Aussie Aussie Aussie, Oi Oi Oi, an Australian chant
• Oratorical Interpretation, an event in American competitive high school forensics

See also

• Ōi (disambiguation), a number of places in Japan and the name of a light cruiser launched in 1920.
• Oy (disambiguation)
• Hoy (disambiguation)
• All pages with titles beginning with Oi
• Oi can also be used as slang