| Acronym | Meaning |
| FACE | Free Air Controlled Enrichment Program |
| SGCR | Subcommittee Global Change Research |
| MHW MO | Mulliken-Helmholz-Wolfsberg Molecular Orbital |
| PABA | P-aminobenzoic Acid |
| AMBER | Assisted Model Building With Energy Refinement |
| MPIF | Myeloid Progenitor Inhibitory Factor |
| PRMO | Partially Restricted Molecular Orbital |
| MLVSS | Mixed Liquor Volatile Suspended Solids |
| TIWLS | Time-independent Wave Packet Lippmann-Schwinger (equation) |
| PEGC | Phonon Glass Electron Crystal |