| Acronym | Meaning |
| ER | Electrical Resistivity |
| MRF | Medium-Range Forecast |
| XMDSL | X Window Interface Distributed Software Library |
| RITS | Radiatively Important Trace Substances |
| MP | MASnet Code For The Xerox 4050 Laser Printers |
| ADDS | Aviation Digital Data Service |
| MHD | Magnetohydrodynamic |
| SAS | Statistical Analysis System |
| RV | Research Vessel |
| IGB | International Geophysical Bulletin |