Chemistry/Biochemistry

• Adenosine triphosphate, the main energy storage and transfer molecule in the cell.

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
• ATP Oil and Gas, an oil and gas company

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
• Authority to Proceed, usually issued by Governmental or Law enforcement organisations.
• ATP Flight School

Professions/Credentials

• Airline Transport Pilot License
• Assistive Technology Practitioner
• Assistant technique en pharmacie (Québec)

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)

Semiconductor Manufacturing

• Assembly, Test and Packaging

Other

• Flight Assignment: A.T.P., an MS-DOS game
• Australian Technology Park, located on the former Eveleigh railway workshops, Redfern NSW Australia
• "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
• Advanced Technology Product, a nomenclatur for the trade of high-tech goods
• Advanced Technology Program, a U.S. Government grants program
• , a supplementary (income-related) pension in Sweden.
• Arbejdsmarkedets Tillaegspension, a supplementary (income-related) pension in Denmark
• Available-to-promise
• Ask Them Personally