| Acronym | Meaning |
| PESOS | Photoelectron Spectroscopy Of The Outer Shell |
| PIGE | Proton Induced Gamma-ray Emission |
| ESD | Emission Standards Division |
| APG | Alkyl Polyglycosidepar |
| FAO | Frozen Atomic Orbital |
| PSP | Paralytic Shellfish Poison |
| IGT | Institute Of Gas Technology |
| OBD | On-board Diagnosis |
| HMMP | Hazardous Materials Management Plan |
| SCC | Self-consistent Collective Coordinate (in Reactive Collisions) |