TO

To may refer to:

• the grammatical particle to
• .to, the Internet domain country code for Tonga
• To Department, one of the 7 departments of the Sissili Province of Burkina Faso
• Johnnie To, a Hong Kong film director and producer
• Marcus To, a Canadian comics artist
• Octet (computing) (teraoctet), a unit of information or computer storage
• To (film), a 1964 Danish film
• To (anime), a 2009 Anime movie by Funimation
• To (play)

TO may stand for:

• President Airlines IATA airline designator
• transavia.com France IATA airline designator
• Tactical Officer, or Officer in Tactical Command
• Tactics Ogre: Let Us Cling Together, a Japanese tactical role-playing video game series
• Takeoff
• takeover, a term used in Internet Relay Chat slang
• Talk.Origins, a Usenet discussion forum
• T and O map (orbis terrae)
• Tantra Online, an online computer game
• Tactical Ops: Assault on Terror, an online computer game
• Telephone operator
• Territorial Defense Forces (TO), a part of the armed forces of the former SFR Yugoslavia
• Tet Offensive
• The Offspring, an American punk rock band
• The Offspring (album), the 1989 debut album by the band above
• The Outsiders (novel), a novel by S.E. Hinton
• Thermal oxidizer
• Thousand Oaks, California
• Tocantins, a state in Brazil
• Tonga ISO 3166-1 alpha-2 country code
• Toronto, "T" stands for Toronto, and "O" stands for Ontario, the province of which Toronto serves as the capital city
• Toulouse Olympique, a French rugby league club
• Transistor Outline, a term that specifies a transistor's package
• Twist off, a type of bottle cap
• The standard abbreviation for the Italian Province of Turin
• Tō, the Japanese version of the pagoda

In sports

• Turnover (disambiguation)
• Time-out (sport)
• Terrell Owens, an Indoor Football League wide receiver
• Tom Osborne, an American football coach and Congressman