| Acronym | Meaning |
| PSU | Practical Salinity Units |
| SPI | Society For The Plastics Industry |
| NITFS | National Imagery Transmission Format Standard |
| LENA | Low-energy Neutral Atom |
| AIRS | Atmospheric Information Retrieval System |
| LAOS | Light Amplifying Optical Switch |
| RSNA | Renal Sympathetic Nerve Activity |
| KTFPB | Potassium Tetrakis[3 |
| EAN | Effective Atomic Number |
| TBLMTO | Tight-binding Linear (combination Of) Muffin-tin Orbitals |