| Acronym | Meaning |
| MPI | Mass Psychogenic Illness (in Indoor Air Pollution) |
| RDGTO | (back-)rotated Distributed Gaussian-type Orbital |
| IRZ | Immediate Response Zone |
| CME | Community Modelling Effort |
| NPV | Net Present Value {economics} |
| TSH | (classical) Trajectory Surface Hopping (for Ion-mol. Collisions) |
| CS | Centrifugal Sudden (approximation) |
| AR | Angle Resolved (technique Prefix) |
| ALS | Acid Labile Subunit |
| HEAST | Health Effects Assessment Summary Tables |