| Acronym | Meaning |
| APTI | Air Pollution Training Institute |
| OMNIS | Observatory For Multiflavor Neutrinos From Supernovae |
| IEEM | Ion-electron Emission Microscopy |
| HTU | Height Of Transfer Unit (in Packed Tower Aeration System) |
| EIIP | Emission Inventory Improvement Program |
| CAIR | Comprehensive Assessment Information Rule (USEPA) |
| AIEMP | Ab Initio Embedding Model Potential |
| BRS | Bibliographic Retrieval Service |
| SEP | Standard Error Of Prediction |
| NRA | Nuclear Reaction Analysis (Rensselear Polytech) |