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'ATP' may refer to:
;Chemistry/Biochemistry:

★ Adenosine triphosphate, the universal energy currency of all known living organisms
;Companies:

★ Alberta Theatre Projects, a major Canadian theatre company.

★ Associated Talking Pictures, a British film company which later became Ealing Studios

★ BAe ATP, the ''British Aerospace ATP''

★ ATP Bonding Systems, a British technology company specialising in adhesives.

★ ATP Flash Cards, American memory card manufacturer known for weatherproof memory.
;Organizations:

★ Academic Talent Program

★ Armenia Tree Project

★ Association of Test Publishers

★ Association of Tennis Professionals, professional men's tennis association

★ Advanced Training Program, Youth soccer training program

★ Anti-Trident Party, Scottish political party
;Professions/Credentials:

★ Airline Transport Pilot License

★ Assistive Technology Practitioner
;Technologies:

★ AppleTalk Transaction Protocol

★ Automated theorem proving

★ Automatic Train Protection

★ Acquisition, tracking and pointing

★ Anti-Tachycardia Pacing (see Implantable cardioverter-defibrillator)

★ Asynchronous Transfer Protocol (telecommunications)

★ Alternative Transients Program
;Other:

★ , a MS-DOS game

★ Australian Technology Park

★ "All Tomorrow's Parties", a song by The Velvet Underground, released in 1967 on the album ''The Velvet Underground and Nico''. The following are named after this song:

★
★ ''All Tomorrow's Parties'', a novel in The Bridge trilogy by William Gibson

★
★ All Tomorrow's Parties, a music festival.

★
★ ATP Recordings, a record label affiliated with the above festival.

★ Accepted Test Plan

★ Accession Time Period

★ Addressee To Pay

★ Adult Treatment Panel, guidelines for patients with high cholesterol

★ Advance Tasting Program, a wine subscription from Ridge Vineyards

★ Advanced Technology Program, a U.S. Government grants program

★ Allmänna tilläggspensionen, a supplementary (income-related) pension in Sweden.

★ Arbejdsmarkedets Tillægspension, a supplementary (income-related) pension in Denmark

★ Available To Promise

★ Ask Them Personally

★ Ameliorate The Predicate