| Acronym | Meaning |
| PE | Population Equivalent (in Wastewater Treatment) |
| POC | Particulate Organic Carbon |
| SWIFT | Stored Wave-form Inverse Fourier Transform |
| EDCS | Energy Distribution Curve Spectroscopy |
| ISAW | Interactive Self-avoiding Walk [modeling] |
| LRAT | Long-range Atmospheric Transport |
| DIA | Drug Information Association |
| PCB | Polychlorinated Biphenyl |
| ISA | Instrument Society Of America |
| MACS | Modified Atomic Charge Superposition (in Calcns. On Atom-surface Scattering Potentials) |