| APA | Administrative Procedure Act | - | Computer Acronyms(common) |
| APA | Air Pathway Analysis | - | Computer Acronyms(common) |
| APA | Adiabatic Perturbation Approxn. (for Quantum Calcns. On Fermi Superfluids) | - | Computer Acronyms(common) |
| APA | Alkaline Phosphatase Activity | - | Computer Acronyms(common) |
| APA | All Points Addressable | - | Human Genome |
| APA | (i) American Psychiatric Association | - | Astronomy |
| APA | Allied Pilot's Association | - | Business and Finance |
| APA | Administrative Procedures Act | - | Business and Finance |
| APA | American Planning Association | - | Business and Finance |
