| Abbreviation | Definition |
|---|---|
| AAPB | Aerobic Anoxygenic Photoheterotroph Bacteria |
| AAPB | Aerobic anoxygenic phototrophic bacteria |
| AAPB | American Archive of Public Broadcasting |
| AAPB | Asociatia Artistilor Plastici Bucuresti |
| AAPC | Advanced Armored Personnel Carrier |
| AAPC | An Ambitious Project Collapsing |
| AAPC | Artificial antigen presenting cell |
| AAPC | Attenuated Adenomatous Polyposis Coli |
| AAPC | Average Annual Percent Change |
| AAPD | As A Product Designer |
| AAPD | Assisted Automated Peritoneal Dialysis |
| AAPD | Average Absolute Percent Deviation |
| AAPF | After Applying the Penalty Factor |
| AAPF | All About Pokemon Figure |
| AAPHP | Acute Adolescent Partial Hospitalization Program |
| AAPHP | Adolescent Acute Partial Hospitalization Program |
| AAPI | American Association of Paranormal Investigators |
| AAPI | Antique and Amusement Photographers International |
| AAPI | Asain American pacific island |
| AAPI | Asian American and Pacific Islander |