| Acronym | Meaning |
| RSC | Risk Specific Concentration |
| PCMT | Protein Carboxyl Methyltransferase |
| APRIL | A Proliferation-inducing Ligand |
| MLPCA | Maximum Likelihood Principal Component Analysis |
| FFM | Finite Field Method (in Mol. Polarizabilities Calcns.) |
| CMB | Core Mantle Boundary |
| MSK | Muscular-skeletal Effects |
| RPWBA | Relativistic Plane-wave Born Approximation |
| TAL | Threshold Ambient Level |
| EIA | Energy Information Administration (DOE) |