| Acronym | Meaning |
| PSB | Product Safety Branch |
| SPA | Shielded-potential Approxn. (in Electronic Structure) |
| LTK | Laser Thermal Keratoplasty |
| ESAT | Environmental Services Assistance Team |
| TNS | 6-p-Toluidino-2-naphthalenesulfonic Acid |
| EROS | Elaboration Of Reactions For Organic Synthesis |
| NNSA | National Nuclear Security Administration |
| EMAS | European Microbeam Analysis Society |
| PSC | Polar Stratospheric Clouds (in Antarctic) |
| NLP | Natural Language Processing |