| Acronym | Meaning |
| PDA | Phase Doppler Analysis |
| AICE | American Institute Of Chemical Engineers |
| EHM | Extended Hubbard Model (hamiltonian) |
| FARCE | Freezing At Reactive Centers Of Enzymes |
| LAO | London Atomic Orbital |
| CERES | Crop Estimation Through Resource And Environment Synthesis Model |
| BIOSIS | BioSciences Information Service |
| NASQAN | National Stream Quality Accounting Network |
| FOCAPD | Foundations Of Computer-aided Process Design |
| FWPCA | Federal Water Pollution Control Administration |