| Acronym | Meaning |
| AASD | Anaerobic Activated Sludge Digestion |
| NPIRS | National Pesticide Information Retrieval System |
| PRBS | Pseudo-random Binary Sequence |
| VPSSQM | Variable-phase Supersymmetric Quantum Mechanics |
| IAHE | International Association For Hydrogen Energy |
| DERA | Defense Environmental Restoration Act |
| IFD | Industrial Facilities Discharge File (file Within STORET) |
| NERC | North American Electric Reliability Council |
| PERC | Passivated Emitter And Rear Cell (solar Cells) |
| BOO | Bond Orientational Order |