HEI

• Environmental sociology
• Graduate Institute of International and Development Studies
• HEI Hospitality
• HEICO
• Hautes études d'ingénieur
• Hawaiian Electric Industries
• He (letter)
• Health Effects Institute
• Healthy Eating Index
• Hei (Darker than Black)
• Hei (album)
• Hei District, Chiba
• Hei Glacier
• Hei River
• Heide–Büsum Airport
• Heighington railway station
• Heilongjiang
• Heiltsuk-Oowekyala language
• Hiei (disambiguation)
• High energy ignition
• High explosive incendiary
• Higher education
• Hot-carrier injection
• Qi