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 HEI Hotels & Resorts is a hospitality owner and operator based in Norwalk, Connecticut. Founded by brothers Gary and Steve Mendell, HEI owns and manages over 90 full service, upper-upscale and luxury hotels and resorts throughout the United Sta ...

, an American hotel owner and operator *

Hawaiian Electric Industries Hawaiian Electric Industries, Inc. (HEI; ) is the largest supplier of electricity in the state of Hawaii, supplying power to 95% of Hawaii's population through its electric utilities: Hawaiian Electric Company, Inc., Hawai'i Electric Light Comp ...

, 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 Higher education is tertiary education leading to award of an academic degree. Higher education, also called post-secondary education, third-level or tertiary education, is an optional final stage of formal learning that occurs after compl ...

institution *

Graduate Institute of International and Development Studies The Graduate Institute of International and Development Studies, or the Geneva Graduate Institute (french: Institut de hautes études internationales et du développement), abbreviated IHEID, is a government-accredited postgraduate institution ...

(French: '), in Geneva, Switzerland * Hautes études d'ingénieur, an engineering school in Lille, France

In language

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

Places

Heilongjiang Heilongjiang () formerly romanized as Heilungkiang, is a province in northeast China. The standard one-character abbreviation for the province is (). It was formerly romanized as "Heilungkiang". It is the northernmost and easternmost province ...

, 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 Hei Glacier () is a glacier flowing northwest between the Hamrane Heights and the Robin Heights in the Sverdrup Mountains of Queen Maud Land, Antarctica. It was photographed from the air by the Third German Antarctic Expedition (1938–39). It ...

, in Antarctica *

Hei River Ejin River (), also Etsin Gol, Ruo Shui () or Ruo He in ancient times, is a major river system of northern China. It flows approximately from its headwaters on the northern Gansu side of the Qilian Mountains north-northeast into the endorheic ...

, in China *

Heide–Büsum Airport Heide–Büsum Airport (german: Flugplatz Heide-Büsum) is an airport serving Heide, a town in the Dithmarschen district in the German state of Schleswig-Holstein. The airport is located northeast of Büsum, a town located about southw ...

, in Schleswig-Holstein, Germany *

Heighington railway station Heighington is a railway station on the Tees Valley Line, which runs between and via . The station, situated north-west of Darlington, serves the villages of Aycliffe and Heighington in County Durham, England. It is owned by Network Rail a ...

, in England

In science and technology

Healthy Eating Index The Center for Nutrition Policy and Promotion (CNPP) is an agency in the U.S. Department of Agriculture, created on December 1, 1994, to improve the health and well-being of Americans by establishing national dietary guidelines based on the best s ...

, a measure of diet quality * High-efficiency incandescent, a type of

incandescent light bulb An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a wire filament heated until it glows. The filament is enclosed in a glass bulb with a vacuum or inert gas to protect the filament from oxida ...

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 In warfare, high-explosive incendiary (HEI) is a type of ammunition specially designed to impart energy and therefore damage to its target in one or both of two ways: via a high-explosive charge and/or via its incendiary (fire-causing) effects. ...

, a type of ammunition *

Hot-carrier injection Hot carrier injection (HCI) is a phenomenon in solid-state electronic devices where an electron or a “ hole” gains sufficient kinetic energy to overcome a potential barrier necessary to break an interface state. The term "hot" refers to ...

, a principle in the function of solid-state electronic devices * Human-environment interaction, or

Environmental sociology Environmental sociology is the study of interactions between societies and their natural environment. The field emphasizes the social factors that influence environmental resource management and cause environmental issues, the processes by whic ...

Other uses