EAI
- AEI (disambiguation)
- East Asia Institute (Korea)
- East Asia Institute (Ludwigshafen)
- Electroacoustic improvisation
- Electronic Arts Intermix
- Electronic Associates, Inc.
- Element AI
- Email address internationalization
- Engineering Animation, Inc.
- Enterprise application integration
- Erythema ab igne
- Excalibur Almaz Inc.
- Weatherhead East Asian Institute