| Acronym | Meaning |
| ERDC | Exploratory Research And Development Center |
| ERDIP | Experimental R & D Incentives Program |
| ERG | External Review Group |
| ERICA | Experiment On Rapidly Intensifying Cyclones And Anticyclones |
| ERICA | Experiment On Rapidly Intensifying Cyclones In The Atlantic |
| ERL | Electromagnetic Radiation Laboratory |
| ERL | Environmental Research Laboratory |
| EROC | Ecological Rates Of Change |
| EROS | Earth Resources Observation System |
| ERS | Earth Remote-Sensing Satellite |
| ERS | Element Requirements Specification |
| ERS | Earth Resources Satellite |
| ERS-1 | European Remote Sensing Satellite 1 |
| ERS-2 | European Remote Sensing |
| ERS-II | European Research Satellite |
| ERSDAC | Earth Resources Satellite Data Analysis Center |
| ERT | Environmental Research And Technology |
| ERTAQ | ERT Air Quality |
| ERTD | Environmental Research & Technology Division |
| ERTS | Earth Resources Technology Satellite |
| ESA | European Space Agency |
| ESA | Endangered Species Act |
| ESA | Exploratory Shaft Facility |
| ESA | Engineering Support Activity |
| ESAD | Earth Science And Applications Division |
| ESC | Engineering Support Center |
| ESCAP | Economic Social Commission For Asia And The Pacific |
| ESCP | Earth Sciences Curriculum Project |
| ESD | Environmental Satellite Data |
| ESD | Electronic System Division |
| ESD | Employment Security Department |
| ESDD | Earth Science Data Directory |
| ESDI | Enhanced Samll Device Interface |
| ESDIM | Earth System Data And Information Management |
| ESDIM | Environmental Science Data Integration And Management |
| ESECA | Energy Supply & Environmental Coordination Act |
| ESF | European Science Foundation |
| ESFU | Enhanced Standard Format Unit |
| ESG | Empirical Study Group |
| ESHP | Effective Shaft Horse Power |
| ESI | Earth Systems Institute |
| ESID | EOSDIS Systems Interface Document |
| ESIG | Environmental And Societal Impacts Group |
| ESIP | Earth System Information Partners Federation |
| ESIS | Earth Science Information System |
| ESIS | ESA Space Information Systems |
| ESJWG | Earth Science Joint Working Group |
| ESL | Earth Sciences Laboratories |
| ESM | Earth Systems Model |
| ESMF | Earth System Model Framework |