| Acronym | Meaning |
| DOI | Department Of The Interior |
| ECP | Eosinophil Cationic Protein |
| GRIDS | Geographic Resources Information And Data System |
| PSM | Process Safety Management |
| MDA | Metal Deactivator |
| RAPRA | Rubber And Plastics Research Association |
| ESEM | Environmental Scanning Electron Microscopy |
| LAIV | Live Attenuated Influenza Virus |
| UPS | Uninterrupted Power Systems (for Computer Networks) |
| RS | Rayleigh Schroedinger (perturbation Theory) |