| Acronym | Meaning |
| TRS | Total Reduced Sulfur |
| CRT | Continuously Regeneration Trap |
| AFBR | Anaerobic Fluidized-bed Reactor |
| GDF | Growth Differentiation Factor |
| USP | United States Pharmacopeia |
| NOES | National Occupational Exposures Survey |
| PDQ | Physician Data Query |
| QDIP | Quantum Dot Infrared Photodetector |
| SCLS | Surface Core Level Shift |
| PON | Particulate Organic Nitrogen |