| Acronym | Meaning |
| GRIMM | Global/Regional Interhemispheric Mercury Model |
| SPT | Selective Polarization-transfer |
| MCM | Multichip Modules |
| GO | Gaussian Overlap (approxn. In Mol. Calcns.) |
| TDM | Truncated Diagonalization Method |
| NODS | NASA Ocean Data System |
| RKRVL | Rydberg-Klein-Rees-Vanderslice-Lakshman (for Potential Energy) |
| UCCD | (spin) Unrestricted Coupled Cluster (with) Double (excitations) |
| SPE | Solar Proton Event |
| UERPIC | Underground Excavation And Rock Properties Information Center |