API
API most often refers to a set of rules that let software programs interact, and it also denotes the active ingredient in a pharmaceutical product.
Medical
Miscellaneous
Application Programmable Interface
Applcation Program Interface
Arnold P Ishnikov
Arithmetic Processor Interface
Astral Projection Isle
Automated Pellet Inspection
Community
Governmental
Acquisition Program Integration
Aviation Preflight Indoctrination
After Project Initiation
Advance Passenger Information
Armor Piercing Incendiary
Affluent Parents Index
Antecedent Precipitation Index
International
Alianza Popular Informativo
Alphabet Phonétique International
Angkatan Pemuda Indonesia
Administración Portuaria Integral
Anonima Petroli Italiana
Agrupación Provincial Independiente
Alianza Popular de Izquierdas
Academic & Science
Academic Performance Index
Asian / Pacific Islander
Atmospheric Pressure Ionization
Academic Perofrmance Index
Alaska Psychiatric Institute
Aromatic PolyImide
Air Pollution Index
Regional
Computing
Application Programming Interface
Application Programming Interfacing
Adobe Acrobat Plug-In
1st Reader Passed parameter file
Adobe Printer Ink file
Asset Priority Index
Application Program Interface file
Advance Programming Interface
Business
American Pirate Industries
Automated Processes Inc
American Petroleum Institute
Advanced Photonix, Inc.
Accountants for the Public Interest
Automotive Professionals, Inc.
American Paper Institute
API Group
Association of Private Investigators
Armor Piercing Incendiary ammunition round
As Per Instructions
Accountable Property Inventory
Australian Pharmaceutical Ind Ltd