| Acronym | Meaning |
| PTA | Packed Tower Aeration |
| FIAS | Flow Injection Atomic Spectrometry |
| AFC | Antibody Forming Cell |
| INID | Internationally Agreed Numbers For The Identification Of Data |
| PBDD | Polybrominated Dibenzodioxin(s) |
| MONOS | Metal Oxide Nitride Oxide Semiconductor |
| MCFC | Molten Carbonate Fuel Cells |
| BCCD | Betaine Calcium Chloride Dihydrate |
| WPCF | Water Pollution Control Federation |
| MRB | Multi-stage Reverse-flow Bioreactor |