| Acronym | Definition |
|---|
| APL | Applied Physics Laboratory |
| APL | Apple Public License (Darwin/Mac OS X Open-Source Project) |
| APL | A Programming Language |
| APL | Approved Products List |
| APL | Applied Physics Letters |
| APL | Applied Physics Lab (Johns Hopkins University) |
| APL | Antiphospholipid |
| APL | Aide Personnalisée Au Logement (French: personalized housing subsidy) |
| APL | Animal Protective League |
| APL | Australian Pork Limited |
| APL | Accredited Prior Learning |
| aPL | Anti-Phospholipid (proteins) |
| APL | Average Picture Level |
| APL | Animal Planet (cable network channel) |
| APL | Approved Product List |
| APL | Anti-Personnel Landmines |
| APL | Automatic Premium Loan (Insurance Term) |
| APL | Assistant Patrol Leader (Boy Scouts of America) |
| APL | Accreditation for Prior Learning |
| APL | Average Path Length |
| APL | Association des Professeurs de Lettres (French: Association of Professors of Letters) |
| APL | Adjustable Pressure Limiting (valve on anesthesia machines) |
| APL | Barracks Craft (Non Self-Propelled) |
| APL | Application Programming Language |
| APL | Approved Parts List |
| APL | Atrichia with Papular Lesions |
| APL | Alles Parallel Loesbar |
| APL | Atomic Power Laboratory |
| APL | Armpit Length (length of hair) |
| APL | Aqueous Phase Liquid |
| APL | Arphic Public License |
| APL | Airport Pseudolite (communications navigation surveillance) |
| APL | Ashland Public Library (Ashland, OH) |
| APL | Army Promotion List |
| APL | Anterior Pituitary-Like |
| APL | Associated Pathologists Laboratories |
| APL | Automatic Programming Language |
| APL | Association de Promotion du Logement (French: Association for the Promotion of Housing; Belgium) |
| APL | Average Power Laser |
| APL | Automatic Parts Loader |
| APL | Adaptive Parametric Linearization |
| APL | Assembly Parts List |
| APL | Association des Pompiers de Laval |
| APL | Application Parts List |
| APL | Acquisition Policy Letter |
| APL | Altoona Parochial League (Pennsylvania)) |
| APL | Alternative Pollutant Limit(s) |
| APL | Applied Psychological Laboratory (India, Defence Institute of Psychological Research) |
| APL | Army Personnel Letter |
| APL | Authorized Price List |
| APL | Annular Pressure Level (oil industry) |
| APL | Annular Pressure Losses (oil drilling) |
| APL | All Plastic Laminate (packaging industry) |
| APL | Association of Police Lawyers (UK) |
| APL | Advanced Prototypes Lab for Satellite Payloads (University of California, Santa Cruz program) |
| APL | Animal Production Level (ruminant nutrition) |
| APL | American Paintball League |
| APL | Amateur Public Link (golf) |
| APL | Ambulance Platoon Leader |
| APL | Advance Payday Loan (consumer finance) |
| APL | Advanced Programming Languages (computer science) |
| APL | Amateur Poker League |
| APL | Alliance of Progressive Labour (Philippines) |
| APL | Additional Paternity Leave |
| APL | Acute Promyelocytic Leukemia |
| APL | Arlington Public Library (various locations) |
| APL | Association of Professional Librarians (various locations) |
| APL | Australian Plague Locust (insect) |
| APL | Abductor Pollicis Longus |
| APL | Accountants Professional Liability (insurance) |
| APL | Analog Private Line |
| APL | Above Poverty Line (India) |
| APL | Airport Lights |
| APL | Allowance Parts List (IIS) |
| APL | Anti-Predatory Lending (policy) |
| APL | Acceptable Performance Levels |
| APL | Airplane |
| APL | Allowance Parts List |
| APL | American Poetry and Literacy project |
| APL | American President Lines |