A hat is an item of clothing worn on the head.

Hat or HAT may also refer to:

Film

  • The Hat (film), a 1999 short film by Michèle Cournoyer
  • The Hat, a 1912 film by Rollin S. Sturgeon
  • The Hat, a 1963 film by Faith Hubley and John Hubley

Mathematics

  • Hat matrix, a mathematical operation in statistics
  • Hat operator, notation used in mathematics
  • Hat function, alternate name for the triangular function
  • The hat tile, a solution to the einstein problem

Organisations

  • Handball Association of Thailand, governing body of handball in Thailand
  • Hutchison Asia Telecom Group, a business division in telecommunications
  • Hellenic Aeronautical Technologies, a Greek aeroplane manufacturer
  • Helicopter Air Transport, a defunct American helicopter operator

People

  • Hat (High Priest of Osiris), the high priest of Osiris during the 19th dynasty of Ancient Egypt
  • Jack McVitie (1932–1967), known as Jack "The Hat", English gangster
  • Les Miles (born 1953), known as The Hat, American football coach
  • Jan Åge Solstad (born 1969), known as Hat, former vocalist for the Norwegian black metal band Gorgoroth

Places

  • Hať, Moravian-Silesian Region, Czech Republic
  • Hat, Azerbaijan
  • Hat, Nepal
  • Hat, Berehove Raion, Ukraine
  • Hat District, Al Mahrah Governorate, Yemen
  • Hat Island (disambiguation)

Science

  • Human African trypanosomiasis (sleeping sickness)
  • HAt, symbol for hydrogen astatide
  • Histone acetyltransferase, an enzyme class
  • HAT medium, used in microbiology and immunology, for example in culturing hybridoma cells
  • Hungarian-made Automated Telescope, used in the HATNet Project

Technology

  • Hardware Attached on Top, expansion board format for the Raspberry Pi computer.
  • Hashed array tree, in computer programming.
  • Help authoring tool, software for "help" documents.

Other uses

  • , an Afrikaans dictionary
  • Haitian Creole language, with ISO 639-2 and 639-3 code <code>hat</code>
  • Hat, slang for the caret (computing) (^)
  • Hat, slang for the circumflex (ˆ)
  • Hat (Davy Graham album), released in 1969
  • Hat. (Mike Keneally album), released in 1992
  • History Aptitude Test, an admissions test at Oxford University
  • The Hat, a Southern California fast-food restaurant
  • The Hat (book), a children's book by Tomi Ungerer
  • Hat (comics), a supervillain from DC Comics
  • "The Hat", an episode of Homicide: Life on the Street (season 4)
  • "The Hat", an episode of Wander Over Yonder
  • Hi-hat (instrument), a standard part of a drum kit
  • Short for hatnote - WP:HAT (disambiguation)

See also

  • Hats (disambiguation)
  • Hatt (disambiguation)
  • Het (disambiguation)
  • Hett (disambiguation)
  • Mr. Hat