| Acronym | Meaning |
| SCN | Suprachiasmatic Nucleus |
| PRDDO | Partial Retention Of Diatomic Differential Overlap |
| EBM | Electron Beam Machining |
| SIMS | Surface Impoundment Modeling System |
| ACRS | Applied Computational Research Society |
| OHEA | Office Of Health And Environmental Assessment (USEPA) |
| MPIF | Myeloid Progenitor Inhibitory Factor |
| WTA | Wind Trajectory Analysis (for Airborne Particulate Samples) |
| ZPC | Zero-point (energy) Corrections |
| SIRS | Systemic Inflammatory Response Syndrome |