| Abbreviation | Definition |
|---|---|
| EOO | Equal Opportunity Office |
| EOP | Earth and Ocean Physics |
| EOP | Experiments of Opportunity |
| EOPAP | Earth and Ocean Physics Application Program |
| EOPD | East Orange Police Department |
| EOPO | Equal Opportunity Program Office |
| EOPR | Engineering Order Purchase Requisition |
| EOPR | Engineering Order Purchase Request |
| EOQ | Economic Order Quantity |
| EOR | Earth Orbit Rendezvous |
| EORTC | European Organization for Research and Treatment of Cancer |
| EOS | Eosinophil |
| EOS | Equal Opportunity Specialist |
| EOS | Earth Observation Satellite |
| EOS | Earth Observing System |
| EOS | Earth Orbit Shuttle |
| EOS | Emergency Oxygen Supply |
| EOS | Emergency Oxygen System |
| EOS | Extended Operating System |
| EOS | Electrophoresis Operations In Space |
| EOS | Equation Operating System |
| EOS | Early Order Scheme |
| EOSDIS | Earth Observing System Data And Information System |
| EOSP | Earth Observing Scanning Polarimeter |
| EOT | End of Transmission |
| EOTD | Enhanced Observed Time Difference |
| EOU | Expert Oriented Unit |
| EP | Ectopic pregnancy |
| EP | Electrophysiologic |
| EP | Emergency Physician |
| EP | Electrical Physiology |
| EP | Extreme Pressure |
| EP | Environmental Protection |
| EP | Electrical Power |
| EP | Environmental Protective Plan |
| EP | Equivalent Person |
| EP | Economic Profit |
| EP | Expensive Price |
| EPA | EicosaPentaenoic Acid |
| EPA | Environmental Protection Agency |
| EPA | European Pollution Agency |
| EPA | Eligible Performer Audition |
| EPA | Energetic Particle Analyzer |
| EPA | United States. Environmental Protection Agency |
| EPA | Environment Protection Agency |
| EPA | Equity Principal Additions |
| EPAR | External Tank Project Assessment Review |
| EPB | Equivalent Pension Benefits |
| EPBF | Effective Pulmonary Blood Flow |
| EPC | Electronic Pressure Control |