| Acronym | Meaning |
| MRSD-CI | Multireference Single And Double Excitation CI |
| NESC | National Environmental Supercomputing Center |
| BOA | Bond Orbital Approximation |
| THGF | Trigonometric Hermite Gaussian Function |
| MRB | Multi-stage Reverse-flow Bioreactor |
| MGMT | O6-methylguanine-DNA Methyltransferase |
| AIMP | Ab Initio Model Potential (for Valence-electron Mol. Calcns.) |
| ECLSS | Environmental Control And Life Support System |
| CPDWB | Coulomb-projected Distorted-wave Born |
| CGR | Crack Growth Rate |