| Acronym | Meaning |
| ACCDPPA | Approx. Coupled Cluster With Double Excitations Polarization Propagator Approxn. |
| ACHMM | Academy Of Certified Hazardous Materials Managers |
| AI | Artificial Intelligence |
| FROG | Frequency-resolved Optical Grating |
| HHE | Health Hazard Evaluation |
| NVPA | No-virtual-pair Approxn. |
| UDI | Utility Data Institute (power Generation) |
| ADAPTS | Air Deliverable Antipollution Transfer System |
| LSS | Lindhard-Scharff-Schiott Theory |
| ECM | Exchange-charge Model |