One-to-one

One-to-one or one to one may refer to:

Mathematics and communication

 * One-to-one function, also called an injective function
 * One-to-one correspondence, also called a bijective function
 * One-to-one (communication), the act of an individual communicating with another
 * One-to-one (data model), a relationship in a data model
 * One to one computing (education), an initiative for a computer for every student
 * One-to-one marketing or personalized marketing, an attempt to make a unique product offering for each customer

Music

 * One to One (band), a 1980s Canadian pop music group
 * One to One (Carole King album), 1982
 * One to One (Christine Fan album), 2005
 * One to One (Howard Jones album), 1986
 * One to One (Syreeta album), 1977
 * One to One (Ed Bruce album), 1981
 * "One to One" (Freeez song)
 * "One to One" (Joe Jackson Band song)

Other uses

 * One to One (Apple), Apple's personal training service
 * One 2 One, a defunct British mobile telecommunications company, which became T-Mobile UK
 * One to One (TV series), an Irish TV series