To, TO, or T.O. may refer to:
Arts and entertainment Film and television To (film), a 1964 Danish film To (anime), 2009
Games Tornado Outbreak, an action-adventure video game Tanki Online, a browser MMO game
Other media To (play), a Polish-language play by Czesław Miłosz Theatre of the Oppressed, originated by Augusto Boal "T.O.", a song by Lil Wayne from the album Funeral "To", a song by Sakanaction from Adapt (2022)
Language To language To (kana), a Japanese syllabic character Tongan language ISO 639 alpha-2 language code
In English The grammatical particle to, used to form for example the infinitive To, a preposition
Military use Officer in tactical command, or tactical officer Territorial Defense Forces (TO), a part of the armed forces of the former SFR Yugoslavia Tet Offensive, a campaign waged during the Vietnam War
People To (surname), including To, Tô, and Tō, a group of surnames of east-Asian origin Tó, Portuguese nickname Tô, Vietnamese surname Terrell Owens, a retired American football wide receiver alternately known as "T.O."
Places Thousand Oaks, California Tô Department, in Sissili Province of Burkina Faso, and the capital, Tô Tonga (ISO 3166-1 alpha-2 country code TO) Toronto, Ontario, Canada Province of Turin, Italy (sometimes abbreviated as TO—for example, on vehicle registration plates)
Science and technology Electronics and computing "Transistor Outline", as a naming component of semiconductor packages; see List of electronic component packaging types#Transistor, diode, small-pin-count IC packages .to, Tonga's Internet country code top-level domain Teraoctet (To), a unit of digital information equal to 1012 octets
Other uses in science and technology Takeoff, the phase of flight in which an aerospace vehicle or an animal goes from the ground to flying in the air Thermal oxidizer, a processing unit for air pollution control in many chemical plants
Transportation President Airlines (IATA code TO), a former airline based in Phnom Penh, Cambodia Transavia France (IATA code TO), a low-cost airline operating as an independent part of the Air France-KLM group
Other uses Tō, a Japanese pagoda Talk.Origins, a moderated Usenet discussion forum concerning the origins of life, and evolution
See also
T/O (disambiguation) Telephone operator (disambiguation) T and O map (orbis terrae), a type of medieval world map