| Acronym | Meaning |
| IPCM | Isodensity Polarizable Continuum Model [ab Initio Method] |
| EI | Emissions Inventory |
| CPA | Coherent Potential Approximation |
| AEP | Auditory Evoked Potential |
| PESM | Photoelectron Spectromicroscopy |
| AIPLA | American Intellectual Property Law Assocn. |
| MDD | Maximum Daily Dose |
| FDR | Frequency Domain Reflectometry |
| UNESCO | United Nations Educational |
| BLS | Bare Lymphocyte Syndrome |