| Acronym | Meaning |
| FC | Frozen Core (approxn. For Electron-atom Scattering Calcns.) |
| OPACA | Organotin Paint Control Act Of 1988 (US) |
| SMIL | Synchronized Multimedia Integration Language |
| LACO | Linearized Atomic Cell Orbital (in Energy-band Calcn.) |
| PIANO | Paraffin |
| SOD | Superoxide Dismutase |
| IGY | International Geophysical Year |
| LAS | Linear Alkylbenzene Sulfonates (anionic Surfactants) |
| RTMS | Room Temperature Molten Salt |
| MCH | Melanin Concentrating Hormone |