- API stands for A Pleasing Interface
- API stands for A Positive Image (various organizations)
- API stands for A Pressen Interaktiv (Norwegian: Digital Media)
- A/PI stands for Ab initio Perturbed Ion (quantum classification method)
- API stands for Absolute Position Indication
- API stands for Academic Performance Index
- API stands for Academic Programs International (Austin, TX)
- API stands for Accelerated Performance Improvement
- API stands for Accountable Property Inventory
- API stands for Acquisition Program Integration
- API stands for Active Pharma Ingredient
- API stands for Active Pharmaceutical Ingredient
- API stands for Administración Portuaria Integral (Mexico)
- API stands for Advanced Passenger Information
- API stands for Advanced Pharmaceutical Ingredients
- API stands for Advanced Photonix, Inc. (various locations)
- API stands for Advanced Polygraph Institute (Australia)
- API stands for Advanced Product Information (various businesses)
- API stands for Advertisers Product Index
- API stands for Aerial Photographic Interpretation (American Society of Photogrammetry and Remote Sensing)
- API stands for After Project Initiation
- API stands for Age Participation Index (UK)
- API stands for Agfa and Picker International
- API stands for Agricultural Price Index
- API stands for Air Photo Interpretation
- API stands for Air Pollution Index
- API stands for Air Position Indicator
- API stands for Aircraft Platform Interface
- API stands for Aircrew Position Indicator (USAF)
- API stands for Aisne Plastique Industrie (French: Aisne Plastic Industry; Aisne, France)
- API stands for Ajax Paving Industries (various locations)
- API stands for Alabama Polytechnic Institute
- API stands for Alagus Printer Installer (software)
- API stands for Alaska Psychiatric Institute
- API stands for Alert Process Improvement (Sprint)
- API stands for Alice Paul Institute (Mount Laurel, NJ, USA)
- API stands for Alliance for the Polyurethanes Industry
- API stands for Allocation de Parent Isolé (French: Single Parent Allowance)
- API stands for Alpha Processor, Inc. (Samsung)
- API stands for Alphabet Phonétique International (French: International Phonetic Alphabet)
- API stands for Alt Preset Insane (MP3 encoder preset)
- API stands for American Pacific Industries (Valencia, CA)
- API stands for American Pain Institute
- API stands for American Paper Institute
- API stands for American Petroleum Institute
- API stands for American Pirate Industries
- API stands for American Prepaid Legal Services Institute
- API stands for American Press Institute
- API stands for American Products, Inc. (Florida)
- API stands for American Professional Institute (Georgia)
- API stands for Analytical Profile Index (microbiology)
- API stands for Anderson Packaging, Inc. (Rockford, IL)
- API stands for Angus Productions Inc.
- API stands for Animal Protection Institute
- API stands for Ankle Pressure Index
- API stands for Année Polaire Internationale (French: International Polar Year; research project)
- API stands for Announcement of Public Interest
- API stands for Annual Physical Inventory
- API stands for Annual Plan for Instruction
- API stands for Annual Premium Income
- API stands for Annual Price Increase
- API stands for Anonima Petroli Italiana SpA (Rome, Italy)
- API stands for Ansal Properties Infrastructure (India)
- API stands for Antecedent Precipitation Index
- API stands for Anti-Poverty Initiative (various locations)
- API stands for Apple Learning Interchange
- API stands for Appleton Papers, Inc. (Appleton, WI)
- API stands for Application Interface (Department of State)
- API stands for Application Platform Interface (software)
- API stands for Application Process Instruction
- API stands for Application Process Integration
- API stands for Application Program Interface
- API stands for Application Programmer Interface (less common)
- API stands for Application Programmers Initiative
- API stands for Application Programming Interface
- API stands for Applications, Programs and Indentures
- API stands for Applied Planning International Inc.
- API stands for Arab Payments and Securities Settlement Initiative
- API stands for Arab Peace Initiative
- API stands for Arab Planning Institute (Kuwait)
- API stands for Architectural Publications Index
- API stands for Arithmetic Polynomial Interpolation
- API stands for Armor-Piercing Incendiary (ammunition)
- API stands for Aromatic Polyimide Insulation
- API stands for Ascendant Partners, Inc.
- API stands for Asia Pacific Initiative (various organizations)
- A/PI stands for Asia/Pacific Islander
- API stands for Asian and Pacific Islander (US Census usage)
- API stands for Asian Pacific Islander (club)
- API stands for Asian Public Intellectuals
- API stands for Asociación Pueblos Indios (Spanish: Indian Peoples’ Association; Costa Rica)
- API stands for Asosiasi Pertekstilan Indonesia (Indonesian Textile Association)
- API stands for AssassinPokémon Initiative (Anti-Pokemon Organization)
- API stands for Asset Performance Inc. (Vancouver, BC, Canada)
- API stands for Asset Priority Index
- API stands for Assistant Principal for Instruction
- API stands for Assistent Project Ingenieur (Dutch: Assistant Project Engineer)
- API stands for Associate in Personal Insurance (insurance)
- API stands for Associated Press International
- API stands for Associated Press of India
- API stands for Association des Parents Indépendants (French: Independent Association of Parents)
- API stands for Association of Physicians in Industry
- API stands for Association of Physicians of India
- API stands for Association of Play Industries
- API stands for Association of Professional Investigators
- API stands for Association Psychanalytique Internationale (International Psychoanalytical Association)
- API stands for Associazione Piccole e medie Industrie
- API stands for Asylum Policy Instruction (UK)
- API stands for Athabasca Potash, Inc. (Petaluma, CA)
- API stands for Athletes’ Performance Institute (Tempe, AZ)
- API stands for Atlantic Paratrans of NYC, Inc
- API stands for Atmospheric Pressure Ionization
- API stands for Attachment Parenting International
- API stands for Audio Products International (various locations)
- API stands for Australian Pharmaceutical Industries Ltd.
- API stands for Australian Pipeline Industry
- API stands for Australian Property Institute (professional body)
- API stands for Australian Public Intellectual Network (non-profit publisher)
- API stands for Authenticity Probability Index
- API stands for Automated Pellet Inspection
- API stands for Automated Physical Inventory
- API stands for Automated Processes, Inc. (est. 1968)
- API stands for Automating Peripherals Incorporated
- API stands for Automation & Process Industriel (French: Industrial Automation & Process)
- API stands for Automation Proficiency Improvement (US Postal Service)
- API stands for Availability Priority Index
- API stands for Average Price Index (describes growth rate, related to inflation measurements)
- API stands for Avian and Pandemic Influenza
- API stands for Aviation Preflight Indoctrination
- API stands for Axial Power Indicator
A/PI