| Acronym | Meaning |
| PCM | Phase-change Material (in Heat Storage) |
| PKA | Protein Kinase A |
| MRO | Medium Range Order |
| SAPW | Symmetrized Augmented Plane Wave |
| DCB | Distorted Coulomb-Born Approxn. |
| ACP | Alternating Current Polarography |
| FRCA | Fire Retardant Chemicals Association |
| AWWA | American Water Works Association |
| SAFIR | Single Aperture Far-Infrared Observatory |
| BRAHMS | Broad RAnge Hadron Magnetic Spectrometers |