EF

EF or ef may refer to:

Arts and entertainment

Ef (band), a post-rock band from Sweden
Ef: A Fairy Tale of the Two.
, a Japanese adult visual novel series by Minori, or its anime adaptations

Businesses and organizations

Eagle Forum, an anti-feminist conservative interest group
Earth First! movement, in environmentalism
Eastern Fare
, a music institution and production house in Bangalore, India
EF Education First an international education organization
The Elias Fund
, a non-profit organization
Far Eastern Air Transport (IATA code EF)

Linguistics

Ef (Cyrillic) (Ф, ф), a letter in the Cyrillic alphabet
F (F, f), a letter in the Latin alphabet

Science

Biology and psychology

Ejection fraction, in cardiovascular physiology
Elongation factors, proteins that are important in protein synthesis
Executive functions, a theorized cognitive system in psychology that controls and manages other cognitive processes

Physics

Electric field, in physics
Exafarad
, an SI unit of electric capacitance
Fermi energy or Fermi level (E_F), both concepts in quantum mechanics

Other sciences

Ecological footprint, the measure of the demand the population has on the environment
Enhanced Fujita scale (EF scale), an improved version of the Fujita scale used to rate the intensity of tornadoes
Ice cap climate, which is abbreviated to EF in the Köppen climate classification

Technology

Canon EF camera, a manual focus 35mm SLR
Canon EF lens mount, Canon's auto-focus lens mount
Entity Framework
, an object-relational mapping (ORM) framework for the .NET Framework

Other uses

Extraordinary Form
, a phrase used to describe the Catholic liturgy of the 1962 Roman Missal
Era Fascista, the Italian fascist calendar
Extra fine, a condition of a coin
Eurofurence, a furry convention in Berlin, Germany

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