| API | 1st Reader Passed parameter file 
| Others |
| API | A Profit Increase
| Others |
| API | Absolute Position Indication
| Others |
| API | Academic Performance Index
| Others |
| API | Academic Perofrmance Index
| Others |
| API | Academic Programs International
| Others |
| API | Accept Practice And Improve
| Others |
| API | Access Preamble Indicator
| Others |
| API | Accountable Property Inventory
| Others |
| API | Accountants for the Public Interest
| Others |
| API | Acquisition Program Integration
| Others |
| API | Active Pharmaceutical Ingredient
| Others |
| API | Active Pharmaceutical Ingredients
| Others |
| API | Active Pharmaceutical Item
| Others |
| API | Adobe Acrobat Plug-In
| Others |
| API | Adobe Printer Ink file
| Others |
| API | Adobe Printing Inks
| Others |
| API | Advance Passenger Information
| Others |
| API | Advance Programming Interface
| Others |
| API | Affluent Parents Index
| Others |
| API | After Project Initiation
| Others |
| API | Aggregate Programming Interface
| Others |
| API | Agri-Processing Index
| Others |
| API | Air Pollutant Index
| Others |
| API | Air Pollution Index
| Others |
| API | Alaska Psychiatric Institute
| Others |
| API | Alianza Popular de Izquierdas
| Others |
| API | Alianza Popular Informativo
| Others |
| API | All Parts In
| Others |
| API | Alternative Press Index
| Others |
| API | American Paper Institute
| Others |
| API | American Petroleum Industry
| Others |
| API | American Petroleum Institute
| Others |
| API | American Pirate Industries
| Others |
| API | Angkatan Pemuda Indonesia
| Others |
| API | Animal Protection Institute
| Others |
| API | Anonima Petroli Italiana
| Others |
| API | Ansal Properties Infrastructure
| Others |
| API | Antecedent Precipitation Index
| Others |
| API | Application Program Interface file
| Others |
| API | Application Programming Interface
| Computer Programming |
| API | Arithmetic Processor Interface
| Others |
| API | Armor Piercing Incendiary
| Others |
| API | Armor Piercing Incendiary ammunition round
| Others |
| API | Arnold P Ishnikov
| Others |
| API | Aromatic PolyImide
| Others |
| API | Article Periodocal Incollection
| Others |
| API | As Per Instructions
| Others |
| API | Asian / Pacific Islander
| Others |
| API | Asian or Pacific Islander
| Others |
| API | Asian Pacific Islander
| Others |
| API | Asociacion de Periodistas de Internet
| Others |
| API | Asociacion de Proveedores de Internet
| Others |
| API | Asset Priority Index
| Others |
| API | Associate in Personal Insurance
| Others |
| API | Association des Professionnels d'Informatique
| Others |
| API | Association for Pathology Informatics
| Others |
| API | Association of Physicians of India
| Others |
| API | Association of Private Investigators
| Others |
| API | Associazione Primatologica Italiana (Italian Primate Association)
| Others |
| API | Assume Positive Intent
| Others |
| API | Asthma Predictive Index
| Others |
| API | Astral Projection Isle
| Others |
| API | Athletes Performance Institute
| Others |
| API | Atmospheric Pressure Ionization
| Others |
| API | Australian Pharmaceutical Industries
| Others |
| API | Australian Property Institute
| Others |
| API | Auto Price Index
| Others |
| API | Autobody Products Inc.
| Others |
| API | Automated Pellet Inspection
| Others |
| API | Automated Processes Inc
| Others |
| API | Automatic Programming Interface
| Others |
| API | Automotive Parts Interpreter
| Others |
| API | Automotive Performance Index
| Others |
| API | Automotive Process Institute
| Others |
| API | Automotive Professionals Inc
| Others |
| API | Automotive Professionals Inc.
| Others |
| API | Automotive Professionals, Inc.
| Others |
| API | Aviation Preflight Indoctrination
| Others |
| API | Ayurvedic Pharmacopoeia of India
| Government, Document, Medical, Medicine |
| API | Portuguese Association of Informatics
| Others |