| Acronym | Meaning |
| BWCCSD | Brillouin-Wigner Coupled-cluster (with) Single (and) Double (excitations) |
| RT-PCR | Reverse Transcription-polymerase Chain Reaction |
| ERAD | Economic And Regulatory Analysis Division (OPPE) |
| MOCVD | Metal Org. Chem. Vapor Deposition |
| FASS | Field-amplified Sample Stacking |
| HSSM | Hydrocarbon Spill Simulation Model |
| SCRAM | EPA Support Center For Regulatory Air Models |
| IPIRDW | Independent-process (and) Isolated-resonance (approxn. Using) Distorted Waves |
| RFQ | Radio-frequency Quadrupole |
| QCCA | Quasiclassical Close-coupling Approximation |