| Acronym | Meaning |
| IRM | Initial Remedial Measure |
| UDI | Utility Data Institute (power Generation) |
| CIR | Cylindrical Internal Reflection |
| ETEX | European Tracer Experiment |
| ECSC | European Coal And Steel Community |
| AUC | Area Under The Curve |
| HQM | Hemiquantal Mechanics (in Mol. Calcns.) |
| KBES | Knowledge-based Expert System |
| ALS | Alternating Least Squares |
| TFA | Target Factor Analysis |