| Acronym | Meaning |
| DPUMPN | Double-annihilation Procedure Unrestricted Moeller-Plesset Nth-order |
| SPASE | South Pole Air Shower Expt. |
| TPPM | Two-pulse Phase Modulation |
| DME | Dielectric Midgap Energy (model) |
| QRIOSA | Quantum Reactive Infinite Order Sudden Approxn. |
| PHT | Pulmonary Hypertension |
| IPVD | Ionized Physical Vapor Deposition |
| LEACHM | Leaching Estimation And Chemistry Model |
| DOCKET | Enforcement Docket |
| CAP | Complex Absorbing Potential |