1. API stands for A Pleasing Interface
  2. API stands for A Positive Image (various organizations)
  3. API stands for A Pressen Interaktiv (Norwegian: Digital Media)
  4. A/PI stands for Ab initio Perturbed Ion (quantum classification method)
  5. API stands for Absolute Position Indication
  6. API stands for Academic Performance Index
  7. API stands for Academic Programs International (Austin, TX)
  8. API stands for Accelerated Performance Improvement
  9. API stands for Accountable Property Inventory
  10. API stands for Acquisition Program Integration
  11. API stands for Active Pharma Ingredient
  12. API stands for Active Pharmaceutical Ingredient
  13. API stands for Administración Portuaria Integral (Mexico)
  14. API stands for Advanced Passenger Information
  15. API stands for Advanced Pharmaceutical Ingredients
  16. API stands for Advanced Photonix, Inc. (various locations)
  17. API stands for Advanced Polygraph Institute (Australia)
  18. API stands for Advanced Product Information (various businesses)
  19. API stands for Advertisers Product Index
  20. API stands for Aerial Photographic Interpretation (American Society of Photogrammetry and Remote Sensing)
  21. API stands for After Project Initiation
  22. API stands for Age Participation Index (UK)
  23. API stands for Agfa and Picker International
  24. API stands for Agricultural Price Index
  25. API stands for Air Photo Interpretation
  26. API stands for Air Pollution Index
  27. API stands for Air Position Indicator
  28. API stands for Aircraft Platform Interface
  29. API stands for Aircrew Position Indicator (USAF)
  30. API stands for Aisne Plastique Industrie (French: Aisne Plastic Industry; Aisne, France)
  31. API stands for Ajax Paving Industries (various locations)
  32. API stands for Alabama Polytechnic Institute
  33. API stands for Alagus Printer Installer (software)
  34. API stands for Alaska Psychiatric Institute
  35. API stands for Alert Process Improvement (Sprint)
  36. API stands for Alice Paul Institute (Mount Laurel, NJ, USA)
  37. API stands for Alliance for the Polyurethanes Industry
  38. API stands for Allocation de Parent Isolé (French: Single Parent Allowance)
  39. API stands for Alpha Processor, Inc. (Samsung)
  40. API stands for Alphabet Phonétique International (French: International Phonetic Alphabet)
  41. API stands for Alt Preset Insane (MP3 encoder preset)
  42. API stands for American Pacific Industries (Valencia, CA)
  43. API stands for American Pain Institute
  44. API stands for American Paper Institute
  45. API stands for American Petroleum Institute
  46. API stands for American Pirate Industries
  47. API stands for American Prepaid Legal Services Institute
  48. API stands for American Press Institute
  49. API stands for American Products, Inc. (Florida)
  50. API stands for American Professional Institute (Georgia)
  51. API stands for Analytical Profile Index (microbiology)
  52. API stands for Anderson Packaging, Inc. (Rockford, IL)
  53. API stands for Angus Productions Inc.
  54. API stands for Animal Protection Institute
  55. API stands for Ankle Pressure Index
  56. API stands for Année Polaire Internationale (French: International Polar Year; research project)
  57. API stands for Announcement of Public Interest
  58. API stands for Annual Physical Inventory
  59. API stands for Annual Plan for Instruction
  60. API stands for Annual Premium Income
  61. API stands for Annual Price Increase
  62. API stands for Anonima Petroli Italiana SpA (Rome, Italy)
  63. API stands for Ansal Properties Infrastructure (India)
  64. API stands for Antecedent Precipitation Index
  65. API stands for Anti-Poverty Initiative (various locations)
  66. API stands for Apple Learning Interchange
  67. API stands for Appleton Papers, Inc. (Appleton, WI)
  68. API stands for Application Interface (Department of State)
  69. API stands for Application Platform Interface (software)
  70. API stands for Application Process Instruction
  71. API stands for Application Process Integration
  72. API stands for Application Program Interface
  73. API stands for Application Programmer Interface (less common)
  74. API stands for Application Programmers Initiative
  75. API stands for Application Programming Interface
  76. API stands for Applications, Programs and Indentures
  77. API stands for Applied Planning International Inc.
  78. API stands for Arab Payments and Securities Settlement Initiative
  79. API stands for Arab Peace Initiative
  80. API stands for Arab Planning Institute (Kuwait)
  81. API stands for Architectural Publications Index
  82. API stands for Arithmetic Polynomial Interpolation
  83. API stands for Armor-Piercing Incendiary (ammunition)
  84. API stands for Aromatic Polyimide Insulation
  85. API stands for Ascendant Partners, Inc.
  86. API stands for Asia Pacific Initiative (various organizations)
  87. A/PI stands for Asia/Pacific Islander
  88. API stands for Asian and Pacific Islander (US Census usage)
  89. API stands for Asian Pacific Islander (club)
  90. API stands for Asian Public Intellectuals
  91. API stands for Asociación Pueblos Indios (Spanish: Indian Peoples’ Association; Costa Rica)
  92. API stands for Asosiasi Pertekstilan Indonesia (Indonesian Textile Association)
  93. API stands for AssassinPokémon Initiative (Anti-Pokemon Organization)
  94. API stands for Asset Performance Inc. (Vancouver, BC, Canada)
  95. API stands for Asset Priority Index
  96. API stands for Assistant Principal for Instruction
  97. API stands for Assistent Project Ingenieur (Dutch: Assistant Project Engineer)
  98. API stands for Associate in Personal Insurance (insurance)
  99. API stands for Associated Press International
  100. API stands for Associated Press of India
  101. API stands for Association des Parents Indépendants (French: Independent Association of Parents)
  102. API stands for Association of Physicians in Industry
  103. API stands for Association of Physicians of India
  104. API stands for Association of Play Industries
  105. API stands for Association of Professional Investigators
  106. API stands for Association Psychanalytique Internationale (International Psychoanalytical Association)
  107. API stands for Associazione Piccole e medie Industrie
  108. API stands for Asylum Policy Instruction (UK)
  109. API stands for Athabasca Potash, Inc. (Petaluma, CA)
  110. API stands for Athletes’ Performance Institute (Tempe, AZ)
  111. API stands for Atlantic Paratrans of NYC, Inc
  112. API stands for Atmospheric Pressure Ionization
  113. API stands for Attachment Parenting International
  114. API stands for Audio Products International (various locations)
  115. API stands for Australian Pharmaceutical Industries Ltd.
  116. API stands for Australian Pipeline Industry
  117. API stands for Australian Property Institute (professional body)
  118. API stands for Australian Public Intellectual Network (non-profit publisher)
  119. API stands for Authenticity Probability Index
  120. API stands for Automated Pellet Inspection
  121. API stands for Automated Physical Inventory
  122. API stands for Automated Processes, Inc. (est. 1968)
  123. API stands for Automating Peripherals Incorporated
  124. API stands for Automation & Process Industriel (French: Industrial Automation & Process)
  125. API stands for Automation Proficiency Improvement (US Postal Service)
  126. API stands for Availability Priority Index
  127. API stands for Average Price Index (describes growth rate, related to inflation measurements)
  128. API stands for Avian and Pandemic Influenza
  129. API stands for Aviation Preflight Indoctrination
  130. API stands for Axial Power Indicator
A/PI
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Abbreviations And Their Meaning