| Acronym | Meaning |
| INDO/S | INDO/spectroscopic Approxn. |
| HENA | High-energy Neutral Atom |
| IAP | Integrin-assocd. Protein |
| NPP | Nuclear Power Plant |
| SPE | Solar Proton Event |
| ISLOCA | Inter-system Loss-of-coolant Accident |
| MOZART | Model For OZone And Related Chemical Tracers |
| SSE | Spinless Salpeter Equation |
| PSES | Pretreatment Standards For Existing Sources |
| SEAMOS | Single-excitations-adapted Molecular Orbitals |