| Acronym | Meaning |
| PSD | Passive Sampling Device(s) (for Air Pollution) |
| PLM | Polarized-light Microscopy |
| WWEMA | Waste And Wastewater Equipment Manufacturers Association |
| ACC | American Chemistry Council |
| NEMA | National Electrical Manufactures Association |
| CONFU | Conference On Fair Use |
| PBCSBR | Porous Biomass Carrier Sequencing Batch Reactor |
| OFPT | Operator Form (of) Perturbation Theory |
| ADA | Adenosine Deaminase |
| CAP | Cellulose Acetate Propionate |