| Acronym | Meaning |
| PFOE | Polarized First-order Exchange |
| IEEE | Institute Of Electrical And Electronics Engineers |
| APEX | Active Plasma Experiment Satellite |
| WSD | Water Saturation Deficit |
| IEV | Ion-exchange Voltammetry |
| NLLSQ | Nonlinear Least Squares |
| TAPPI | Technical Association Of The Pulp And Paper Industry |
| BCRU | British Committee On Radiation Units And Measurements |
| PONA | Paraffins, Olefins, Naphthalenes, And Aromatics (in Petroleum Analysis) |
| APS | Active Pixel Sensor |