| Acronym | Meaning |
| SCTDA | Separated Channel Tamm-Dancoff Approxn. |
| DCEP | Direct Current Electrode Positive |
| RDA | Regularized Discriminant Analysis |
| FDM | Field Desorption Microscopy |
| CRM | Certified Reference Material |
| DMPP | 1,1-dimethyl-4-phenylpiperazinium Iodide |
| CTEB | Carcinogenesis And Toxicologic Evaluation Branch |
| LCAO CO | Linear Combination Of Atomic Orbitals Crystal Orbital |
| HMRCI | Hazardous Materials Control Research Institute |
| OLR | Organic Loading Rate |