ATP

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Science, technology and biology

Adenosine triphosphate, an organic chemical used for driving biological processes
- ATPase, any enzyme that makes use of adenosine triphosphate
Advanced Technology Program, US government program
Alberta Taciuk process, for extracting oil from shale, etc.
Anti-tachycardia pacing, process similar to a pacemaker
Assistive Technology Practitioner - Rehabilitation Engineering and Assistive Technology Society of North America (RESNA)
AT Protocol, an open communications protocol intended for decentralized social networking services
Automated theorem proving, method of proving mathematical theorems by computer programs

Association of Tennis Professionals, men's professional tennis governing body
- ATP Tour
American Technical Publishers, employee-owned publishing company
Armenia Tree Project, non-profit organization
Association for Transpersonal Psychology
ATP architects engineers, architecture- and engineering office for integrated design
ATP Oil and Gas, defunct US energy company

All Tomorrow's Parties (festival), UK organisation
- ATP Recordings, record label
Alberta Theatre Projects, professional, not-for-profit, Canadian theatre company
Associated Talking Pictures, former name of Ealing Studios, a television and film production company

British Aerospace ATP, airliner
Airline transport pilot license
ATP Flight School, US
ATP (treaty), UN treaty that establishes standards for the international transport of perishable food
Aitape Airport, Papua New Guinea, IATA code
Anti-trespass panels, meant to deter pedestrians from walking on or adjacent to train tracks
Automatic train protection, system installed in trains to prevent collisions through driver error
- Automatic Train Protection (United Kingdom), method of beacon based railway cab signalling