| Acronym | Meaning |
| IPPA | Independent Pair-potential Approximation |
| CIOS | Classical Infinite Order Sudden (in Atom-mol. Reaction Calcns.) |
| RSF | Relative Sensitivity Factor |
| ELKM | Extended Lumped Kinetic Model |
| HETE | High Energy Transient Explorer |
| EPEN | Empirical Potential (based On Interaction Of) Electrons (and) Nuclei |
| LTMED | Low Temperature Multi-effect Distillation |
| SIFCA | Slurry-infiltrated Fiber Castable [ceramic Casting Technique] |
| OCEE | Overlap Corrected Electronegativity Equalization |
| DARMA | Deterministic Autoregressive Moving Average |