| Acronym | Meaning |
| PSI | Plan Shear Indicator |
| A/I | Accident/incident |
| AVS | Application Visualization System |
| PRUDENCE | Prediction Of Regional Scenerios And Uncertainties For Defining European Climate Change Risks And Effects |
| DPH | Dew-point Hygrometer |
| EDP | Embedded Data Processor |
| ERAB | Energy Research Advisory Board |
| ARC | Applied Research Corporation |
| SCOSTEP | Scientific Committee On Solar-Terrestrial Physics |
| NGDC | National Geophysical Data Center |