| Acronym | Meaning |
| PPT | Parts Per Trillion |
| SOP/ED | Split-operator Propagator (for) Electronically Diabatic (phenomena) |
| NELAC | National Environmental Laboratory Accreditation Conference |
| EMF | Electromagnetic Force |
| SOLSE | Shuttle Ozone Limb Sounding Experiment |
| OWEC | Office Of Wastewater Enforcement And Compliance |
| EFP | Effective Fragment Potential Method |
| MS X(ALPHA) | Multiple-scattering X(alpha) Exchange Method |
| FWPCA | Federal Water Pollution Control Administration |
| ADT | Air Dry Ton [of Cellulose Pulp] |