| Acronym | Meaning |
| IAP | Intermittent Aeration Process (for Waste Treatment) |
| PUF | Polyurethane Foam |
| IMDL | Interlaboratory Method Detection Limits |
| SBSR | Single Bead String Reactor |
| RECA | Regional Energy Convergence Approxn. (in Total Energies Calcns.) |
| PICT | Pollution-induced Community Tolerance |
| CDF | Cumulative Distribution Functions |
| DPM | Disintegrations Per Minutepar |
| ITER | International Thermonuclear Experimental Reactor |
| RFC | Inhalation Reference Concentration |