| AP | Associated Press |
| AP | Advanced Placement |
| AP | Access Point |
| AP | Accounts Payable |
| AP | Associate Professor |
| AP | Andhra Pradesh (India) |
| AP | Apartment |
| AP | Airplane |
| AP | Air Pollution |
| AP | Armed Forces Pacific |
| AP | Accredited Professional |
| AP | Access Port |
| AP | Assistant Principal |
| AP | Transport |
| AP | Asia Pacific |
| AP | Anatomy and Physiology |
| AP | Action Potential |
| AP | Arabian Peninsula |
| AP | All Purpose (RealTree camoflauge) |
| AP | Application Process |
| AP | Automotive Parts |
| AP | Attack Power |
| AP | Apostle |
| AP | Assistant Professor |
| AP | Ampicillin |
| AP | Applied Physics |
| AP | Action Plan |
| AP | Adobe Photoshop |
| AP | Asset Protection (retail) |
| AP | Application Program |
| AP | Academic Press |
| AP | Attachment Parenting (parenting style) |
| AP | Accelerator Pedal (automotive technology) |
| AP | Amapa (Brazil) |
| AP | Another Place (gaming forum) |
| AP | Anteroposterior |
| AP | American Pie (movie) |
| AP | Armor-Piercing |
| AP | Air Pump |
| AP | Active Participation (teaching style; also policy framework) |
| AP | Assistant to the President (LDS Mission) |
| AP | Arlington Park (race track; Arlington Heights, IL) |
| AP | Asphalt |
| AP | Apple Pie |
| AP | Austin Powers |
| AP | Almost Perfect |
| AP | Animal Planet (television network) |
| AP | American Psycho (movie) |
| AP | Acupuncture |
| AP | Amount of Precipitation |
| AP | Angina Pectoris |
| AP | Average Power (US DoD) |
| AP | Amateur Photographer (UK Magazine) |
| AP | Antennas and Propagation (IEEE) |
| AP | Alpha Phi (El Camino College Chapter of Alpha Gamma Sigma Honor Society) |
| AP | Absolute Power (movie) |
| AP | Application Protocol |
| AP | Alternative Press (magazine) |
| AP | Administrative Procedure |
| AP | Atmospheric Pressure |
| AP | Associate Producer (various organizations) |
| AP | All Points |
| AP | Applique |
| AP | Alan Parsons (musician) |
| AP | Action Point |
| AP | Adjunct Professor |
| AP | Autopilot |
| AP | American Plan |
| AP | Annual Plan |
| AP | Animal Protein |
| AP | Amapá (Brazilian state) |
| AP | Anatomic Pathology |
| AP | Adrian Peterson (football player) |
| AP | Anchor Point (US DoD) |
| AP | Audience Participation |
| AP | Arbeiderpartiet |
| AP | Access Provider |
| AP | Ability Power (League of Legends) |
| AP | Array Processor |
| AP | Ante Partum (Latin: Before Birth) |
| AP | Alfa Parf (hair care) |
| AP | Analytical Psychology (Carl Jung) |
| AP | Artist's Proof (also seen as A/P) |
| AP | Application Processor |
| AP | Acute Pain |
| AP | Antipersonnel |
| AP | Alianza Popular (Spanish political party) |
| AP | Anti-Proton (TV show Andromeda) |
| AP | Ammonium Perchlorate |
| AP | Advanced Program |
| AP | After Peak |
| AP | Analysis Paralysis (gaming) |
| AP | Aperture Priority (camera) |
| AP | Acid Phosphatase |
| AP | Accounting Period (USPS) |
| AP | Air Police |
| AP | Anterior Posterior (radiology) |
| AP | Advance Payment |
| AP | Apparent Power |
| AP | Aerial Platform |
| AP | Anisotropy Parameter |
| AP | Air Publication |
| AP | Atelier Protégé (French: Sheltered Workshop) |
| AP | Apurinic |
| AP | Apyrimidinic |
| AP | Airport Plaza (Crystal City, Arlington, VA) |
| AP | Academic Psychiatry (journal) |
| AP | Apothecaries' (possessive) |
| AP | Acquisition Plan |
| AP | Application Profile (OSI) |
| AP | Additional Premium |
| AP | Associate Program (US Army) |
| AP | Advanced Purchase |
| AP | Access Panel |
| AP | America's Promise (Alliance for Youth) |
| AP | Attitude Problem |
| AP | Avrupa Parlamentosu (Turkish: European Parliament) |
| AP | Authorized Person |
| AP | Acellular Pertussis |
| AP | Associate Partner |
| AP | Administration Pénitentiaire (French: Prison Administration) |
| AP | Astral Projection |
| AP | Advancement Project |
| AP | Antarctic Press (comic book publisher) |
| AP | Assistance Payments |
| AP | Answer Print |
| AP | Agrarian Party |
| AP | Auxiliary Police |
| AP | Anthropod |
| AP | Aged Parent |
| AP | Advantage Player (gambling) |
| AP | Arithmetic Progression |
| AP | Assistant Producer |
| AP | Anomalous Propagation |
| AP | Autism Partnership |
| AP | Athletes' Performance (est. 1999) |
| AP | Auxlliary Propulsion |
| AP | Affirmative Procurement |
| AP | Audio Patchbay (cable) |
| AP | Academic Pressure |
| AP | Asian Pride |
| AP | Advanced Procurement |
| AP | Annualized Premium |
| AP | Ability Points (roleplaying games) |
| AP | Aggregation Point |
| AP | Acción Popular (Popular Action, Peru) |
| AP | Alki Point (Washington) |
| AP | Advance Party |
| AP | Ascoli Piceno, Marche (Italian province) |
| AP | Atypical Pneumonia |
| AP | anonymous platform (computing) |
| AP | Applications Process(es) |
| AP | Allied Perils (insurance) |
| AP | Academic Proficiency |
| AP | Acupuncture Physician |
| AP | Apelação (Appeal; Brazil) |
| AP | As Purchased (ingredients weight for baking or cooking) |
| AP | Assigned Personnel |
| AP | Acidification Potential (environmental science) |
| AP | Astropulse (computing) |
| AP | Acetone Peroxide (explosive) |
| AP | Authentication Proxy |
| AP | Attack Points (gaming) |
| AP | Appeal Panel |
| AP | Allied Publication |
| AP | Alarm Processor (AT&T) |
| AP | Access Proxy |
| AP | Alternative Pipe |
| AP | Armor Penetrating |
| AP | Approved Permit |
| AP | Accessory Pathway |
| AP | Applications Programmer (Tandem) |
| AP | Adjective Phrase |
| AP | American Petroleum, Inc. (Ohio) |
| AP | Accredited Person |
| AP | Adjunct Processor |
| AP | Accounting Point |
| AP | Approving Official |
| AP | Advanced Prediction |
| AP | Advance Procurement |
| AP | Assumed Position |
| AP | Adaptation Period |
| AP | Activation Product |
| AP | Access Permit |
| AP | Affleck's Palace |
| AP | Automation Production |
| AP | Accession Partnership (European Union) |
| AP | Appropriate Projects (Water Charity) |
| AP | Adductor Pollicis |
| AP | Aunt Pat (band) |
| AP | Attached Processor |
| AP | Asset Position |
| AP | Arunachal Pradesh, India |
| AP | Geomagnetic Activity Index |
| AP | Accumulation Period |
| AP | Accredited Personnel |
| AP | Alien Patrol (gaming) |
| AP | Avian Pox |
| AP | Adlerian Psychology (Alfred Adler) |
| AP | Availability Planning |
| AP | Acoustic Processor |
| AP | Auxiliary Pump |
| AP | Arithmetic Processor |
| AP | Agouti Protein |
| AP | Attribute Point(s) |
| AP | Abdominal Perineal |
| AP | Adapter Panel |
| AP | Armenian Power (gang) |
| AP | Activity Package |
| AP | Associative Processor |
| AP | Active Patriot |
| AP | Artificial Pneumothorax (medical) |
| AP | Actinic Prurigo (skin disease) |
| AP | Automatic Pagination |
| AP | Application Partition (Cisco) |
| AP | Année Passé (French: last year) |
| AP | Appearance Potential |
| AP | Administration des Pensions (French: Pensions Administration; Belgium) |
| AP | Ammunition Point |
| AP | Aussie Pwnage (gaming clan) |
| AP | Autobusni Promet (Croatian: Shareholding for Transport of Passengers) |
| AP | Aryan Pride |
| AP | Associated Processor |
| AP | Associazione Polisportiva (Italian: Sports Association) |
| AP | Amtliche Prüfungsnummer (German: Official Test Number; wine) |
| AP | Attached Payload |
| AP | Attaching Part |
| AP | Author's Proof |
| AP | Angoraphobia (Christmas) |
| AP | Assoprovider (Italian ISP association) |
| AP | Adjustment Pending |
| AP | Add Packed (IBM) |
| AP | Analysis Propagation |
| AP | Administrative Processor |
| AP | Armada Portuguesa (Portuguese Navy) |
| AP | Applied Photochemistry |
| AP | Automatska Puška (Croatian: automatic rifle) |
| AP | Attitude Planning |
| AP | Auto Prévention |
| AP | Athens Process (former SEEERF) |
| AP | Advocacy Poll |
| AP | Academy of Peridontology |
| AP | Argument Programming |
| AP | Ampere Plug |
| AP | Aviation Proponency (US Army) |
| AP | Alpha-2-Antiplasmin Activity |
| AP | Access Permittee (TV and radio broadcasting) |
| AP | Arapahoe Philharmonic (Littleton, CO) |
| AP | Aveling Park |
| AP | Armies in the Pacific (used with APO/FPO) |
| AP | Attorney's Preference |
| AP | Advisory Panel on Administration |
| AP | Arithemetic Progression |
| AP | Daily Planetary Amplitude |
| AP | Assessment of Power Coefficient |
| AP | Arithmetic/Associative Processor |
| AP | Ante Parandum (Latin: Before Dinner) |
| AP | Amphibian Press (FFFBI) |
| AP | Aided Pilotage |
