| APA | Aborigines Progressive Association 
| Others |
| APA | Academic Pediatric Association
| Others |
| APA | Academics for Proper Attribution
| Others |
| APA | Accelerator Pedal Actuator
| Others |
| APA | Access Path Attention
| Others |
| APA | Accredited Parliamentary Assistant
| Others |
| APA | Acolytes Protection Agency
| Others |
| APA | Active Park Assist
| Others |
| APA | Active Partitioning
| Others |
| APA | Adaptec Portable Adapter
| Others |
| APA | Adaptive Packet Assembly
| Others |
| APA | Adirondack Park Agency
| Others |
| APA | Administrative Procedure Act
| Others |
| APA | Administrative Procedures Act
| Others |
| APA | Administrative Process Act
| Others |
| APA | Adobe Photoshop Album
| Others |
| APA | Advance Pricing Agreement
| Others |
| APA | Advance Procurement Authorization
| Others |
| APA | Advance Provisioning Allowance
| Others |
| APA | Advanced Park Assist
| Others |
| APA | Advanced Parking Aid
| Others |
| APA | Advanced Performance Algorithm
| Others |
| APA | Advanced Processor Assembly
| Others |
| APA | Advanced Provisioning Allowance
| Others |
| APA | Aerial Photograph Atlas
| Others |
| APA | African Paddling Association
| Others |
| APA | African Pigeon Association
| Others |
| APA | Against Professional Advice
| Others |
| APA | Agency for the Performing Arts
| Others |
| APA | Agrupaciones de Productores Agrarios
| Others |
| APA | Air Pathway Analysis
| Others |
| APA | Alaska Packers Association
| Others |
| APA | Alaska Power Administration
| Others |
| APA | Aldosterone-producing adenoma
| Others |
| APA | Alkaline Phosphatase Activity
| Others |
| APA | All Points Addressable
| Others |
| APA | Allied Pilots Association
| Others |
| APA | Allied Professional Association
| Others |
| APA | Allowance for Project Adjustment
| Others |
| APA | Always Petite Accommodations
| Others |
| APA | Amateur Press Association
| Others |
| APA | Amateur Publication Association
| Others |
| APA | Amatuer Press Assciation
| Others |
| APA | Amazing Problem Attackers
| Others |
| APA | American Pale Ale
| Others |
| APA | American Parquet Association
| Others |
| APA | American Payroll Association
| Others |
| APA | American Philological Association
| Others |
| APA | American Philosophical Association
| Others |
| APA | American Phonetic Alphabet
| Others |
| APA | American Photographic Artists
| Others |
| APA | American Planning Association
| Others |
| APA | American Plywood Association
| Others |
| APA | American Polygraph Association
| Others |
| APA | American Pontiac Association
| Others |
| APA | American Poolplayers Association
| Others |
| APA | American Poultry Association
| Others |
| APA | American Psychcological Assosiation
| Others |
| APA | American Psychiatric Association
| Others |
| APA | American Psychoanalytic Association
| Others |
| APA | American Psychological Affiliation
| Others |
| APA | American Psychological Association
| Others |
| APA | American Psychological Assosiation
| Others |
| APA | American Psychology Association
| Others |
| APA | American Psyciatric Association
| Others |
| APA | Amicale Peugeot Autriche
| Others |
| APA | Amys Pokemon Adventure
| Others |
| APA | Angel'z Petz Adoptions
| Others |
| APA | Animal Products Act
| Others |
| APA | Animal Protective Association
| Others |
| APA | Anti-Polymer Antibody
| Others |
| APA | Any Pocket Any
| Others |
| APA | Apache Languages
| Others |
| APA | Apache Railway
| Others |
| APA | Apache Railway Company
| Others |
| APA | Application Previously Approved
| Others |
| APA | Appropriation Purchase Account
| Others |
| APA | Approved Publication Arrangement
| Others |
| APA | Architectural Precast Association
| Others |
| APA | Argentine Paleontological Association
| Others |
| APA | Arithmetic Processing Accelerator
| Others |
| APA | Army Pre-positioned Afloat
| Others |
| APA | Army Procurement Agency
| Others |
| APA | As Per Actual
| Others |
| APA | Ashley Parker Angel
| Others |
| APA | Asia Pacific Automotive
| Others |
| APA | Asian Pacific American
| Others |
| APA | Asociacion de Prensa Automotriz
| Others |
| APA | Asset Purchase Agreement
| Others |
| APA | Associate in Premium Auditing
| Others |
| APA | Association of Paper Archivists
| Others |
| APA | Association of Parents of Addicts
| Others |
| APA | Association of Police Authorities
| Others |
| APA | Association of Practising Accountants
| Others |
| APA | Association of Psychologists in America
| Others |
| APA | Association pour la Protection des Automobilistes
| Others |
| APA | Attack Transport (Auxiliary, Personnel, Attack)
| Others |
| APA | Audi Production Award
| Others |
| APA | Audio Publishers Association
| Others |
| APA | Austin Pets Alive
| Others |
| APA | Australian Postgraduate Award
| Others |
| APA | Authentication Perpendicular Array
| Others |
| APA | Auto Parts and Accessories
| Others |
| APA | Auto Port Aggregation
| Others |
| APA | Automated Password Agent
| Others |
| APA | Automatic Panel Alignment
| Others |
| APA | Automatic Parking Assist
| Software, System, Technology, Transport |
| APA | Automobile Protection Association
| Others |
| APA | Automotive Parts Associates
| Others |
| APA | Automotive Photographers Association
| Others |
| APA | Automotive Photography Awards
| Others |
| APA | Automotive Press Association
| Others |
| APA | Auxillary Personal Attack
| Others |
| APA | Avast Pro Antivirus
| Others |
| APA | Average Points Against
| Others |
| APA | Average Projected Area
| Others |
| APA | Aviation Pilot (airship)
| Others |
| APA | Axxess Protection Agency
| Others |
| APA | Azirian Phonetic Alphabet
| Others |
| APA | The Acolyte Protection Agency
| Others |
| APA | The Acolytes Protection Agency
| Others |