| Acronym | Meaning |
| ACE | Angiotensin-converting Enzyme |
| API | Air Pollution Index |
| GWD | Gaussian Wave Packet Dynamics |
| OCE | One-center Expansion (SCF MO Method) |
| EP | Extraction Procedure |
| AATB | American Association Of Tissue Banks |
| EASTT | Environmental Advisory Service For Technology Transfer |
| GRHF | Generalized Restricted Hartree-Fock |
| AMAP | Arctic Monitoring And Assessment Program |
| DXRD | Differential X-ray Diffraction |