| Acronym | Meaning |
| EST | Eastern Standard Time |
| OPE | Operator Product Expansion |
| LOEL | Lowest-Observed-Effect Level |
| RCRA | Resource Conservation And Recovery Act Of 1976 |
| ESP | Exchangeable Sodium Percentage (soils) |
| PA | Photoinduced Absorption |
| ILTJ | Iodine-Laser Temperature Jump |
| WERC | Waste-management Education & Research Consortium |
| ODCPA | Off-diagonal (disorder) Coherent-potential Approxn. |
| TDPT | Time-dependent Perturbation Theory |