| Acronym | Meaning |
| PCM | Phase-change Material (in Heat Storage) |
| CSIR | Chemistry Software And Information Resources |
| VCDT | Vienna Canyon Diablo Troilite |
| ASA | Alternancy Symmetry Adapted (method For Spin-independent Hamiltonians For Alternant Hydrocarbons) |
| GIPM/D | Ground State Inversion Potential Method Including Diffraction |
| FIT | Flow Injection Titration |
| RSC | Relative Source Contribution |
| SARA | Superfund Amendments And Reauthorization Act Of 1986 |
| SUPERDARN | Super Dual Auroral Radar Network |
| BPT | Best Practical Technology |