| Acronym | Meaning |
| MCPN | Matrix Coherent Potential Approximation |
| NEWWA | New England Water Works Association |
| JTU | Jackson Turbidity Unit |
| GFCS | Gas Filter Correlation Spectroscopy |
| PSEP | Polyhedral Skeletal Electron Pair (for Metal Clusters) |
| AWRA | American Water Resources Association |
| LAT | Latency-associated Transcript |
| FSGF | FREEON Symmetric Group Formulation (of Hartree-Fock Theory) |
| POSS | Polyhedral Oligomeric Silsesquioxane |
| CERL | Construction Engineering Research Laboratory (US Army) |