one-to-one

• 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

• 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)

• 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
• One to One: John & Yoko, a 2024 film about John Lennon and Yoko Ono

• 1-1 (disambiguation)
• One-to-many (disambiguation)
• Many-to-many
• One on One (disambiguation)
• One-way (disambiguation)

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