| Acronym | Meaning |
| EAL-MCDF | Extended Average Level-(relativistic) Multiconfiguration Dirac-Fock |
| RVB | Resonating Valence Bond (theory Of High-tc Superconductors) |
| ESD | Emission Standards Division |
| PRP | Potentially Responsible Party (Superfund) |
| CCFO | Charge-charge Flux Overlap (model In Mol.-property Calcns.) |
| LMW | Low Molecular Weight |
| PWSB | Plane-wave Second Born |
| LOIS | Land-Ocean Interaction Study |
| TGSCC | Transgranular Stress-corrosion Cracking |
| BST | Bovine Somatotropin |