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EF

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EF or ef may refer to:

Arts and entertainment

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Businesses and organizations

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Linguistics

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

Science

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Biology and psychology

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Physics

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Other sciences

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  • 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

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Other uses

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