| Acronym | Meaning |
| ER | Electrical Resistivity |
| ND | Near-dedicated |
| EOC | EOS Operations Center |
| S/TM | Stratospheric/tropospheric Measurements |
| FIFE | First ISLSCP Field Experiment |
| MDM | Multiplexer/demultiplexer |
| ROC | Regional Observational Cooperative |
| STEM | Science Technology Engineering And Mathematics |
| DIC | Defense Intelligence College |
| PDU | Protocol Data Unit |