Hei is the Norwegian word for "Hi" or "Hello". It is less formal than for example "God Dag" Which means Good Day. It may also refer to:

Companies and organizations

* HEI Hospitality, an American hotel owner and operator * Hawaiian Electric Industries, the largest supplier of electricity in the state of Hawaii *

Health Effects Institute The Health Effects Institute (HEI) is an independent, non-profit corporation specializing in research on the health effects of air pollution. It is headquartered in Boston, Massachusetts, United States. HEI was founded in 1980 with Archibald Cox ...

, a non-profit focused on the health effects of air pollution * HEICO, HEI is the stock symbol for HEICO Corporation

In education

* Higher education institution * Graduate Institute of International and Development Studies (French: '), in Geneva, Switzerland * Hautes études d'ingénieur, an engineering school in Lille, France

In language

He (letter) He is the fifth letter of the Semitic abjads, including Phoenician Hē , Hebrew Hē , Aramaic Hē , Syriac Hē , and Arabic . Its sound value is the voiceless glottal fricative (). The proto-Canaanite letter gave rise to the Greek Epsilon Ε ...

, the fifth letter of many Semitic alphabets * Heiltsuk-Oowekyala language, spoken in Canada

Places

* Heilongjiang, a province of China *

Hei District, Chiba was an administrative district of Japan located in southern Chiba Prefecture. During and before the Edo period, the district was called . History Hei District was one of the four modern districts created in former Awa Province on April 1, ...

, a former administrative unit of Japan * Hei Glacier, in Antarctica * Hei River, in China * Heide–Büsum Airport, in Schleswig-Holstein, Germany * Heighington railway station, in England

In science and technology

* Healthy Eating Index, a measure of diet quality * High-efficiency incandescent, a type of incandescent light bulb *

High energy ignition High energy ignition, also known as H.E.I., is an electronic ignition system designed by the Delco-Remy Division of General Motors. It was used on all GM vehicles, at least in the North American market, from 1975 through the mid-1980s. There were ...

, an automotive ignition system * High explosive incendiary, a type of ammunition * Hot-carrier injection, a principle in the function of solid-state electronic devices * Human-environment interaction, or Environmental sociology

Other uses