EO
- Captain EO
- EO (film)
- EO (rapper)
- EO Personal Communicator
- Earth observation
- East Otago
- Eastern Orthodoxy
- Education Otherwise
- Eight Ones
- Electro-optics
- Elevorganisasjonen
- Entrepreneurs' Organization
- Eo (constructed language)
- Eo (hangul)
- Eo (instrument)
- Eo (river)
- Eoarchean
- Eosinophilic oesophagitis
- Equal opportunity
- Equipment Operator (US Navy)
- Esperanto
- Ethylene oxide
- Evangelische Omroep
- Executive Officer
- Executive Outcomes
- Executive order (United States)
- Express One International
- Extremal optimization
- Hewa Bora Airways
- Hyundai EO
- TabletKiosk