HF

HF, Hf or hf can refer to:

Arts and entertainment

 * HammerFall, a Swedish power metal band
 * Hard-Fi, an English indie rock band
 * Star Trek: Hidden Frontier, a long-running Star Trek fan-fiction series
 * Hi-hat with foot, part of a drum kit

Business

 * Hlutafélag (hf.), a form of limited liability company in Iceland
 * Hapag-Lloyd Flug, a German airline (former IATA code) doing business as TUIfly
 * Air Côte d'Ivoire, an Ivorian airline (IATA code)
 * Hedge fund

Education

 * Higher Preparatory Examination (HF) (Højere Forberedelseseksamen), a Danish examination programme
 * Heraldo Filipino, the student newspaper of De La Salle University-Dasmariñas, Cavite, Philippines
 * Homewood-Flossmoor High School, Flossmoor, Illinois

Organizations

 * Humanity First, an international charitable organisation, which focuses on immediate disaster response and long-term development
 * Health trust (Helseforetak), a Norwegian hospital enterprise
 * Heritage Front, a white supremacist and Canadian Nationalist group
 * Hudobný fond (Music Fund Slovakia), a presenter of the ZAI Awards

Biology and medicine

 * Heart failure
 * Holstein Friesian cattle, HF, a breed of cattle
 * Steve Biko Academic Hospital, a hospital in Pretoria, South Africa, formerly called H F Verwoerd Hospital
 * Hippocampal formation, region in the brain

Chemistry

 * Hafnium, symbol Hf, a chemical element
 * Hartree–Fock method, a calculation scheme in the field of computational chemistry
 * Hydrogen fluoride, HF, a diatomic compound which can dissolve in water to form hydrofluoric acid, a highly corrosive solution
 * Hydrofluoric acid, HF(aq), a solution of hydrogen fluoride (HF) in water

Other uses in science and technology

 * Handsfree, equipment that can be used without the use of hands
 * Helicon Filter, photo editing software
 * Helicon Focus, a photo-merging program used to increase depth of field or make panoramas
 * High frequency, the ITU 3–30 MHz radio frequency range (band)

Sport

 * Half-Forward, an Australian Rules football position
 * Heinz Field, a stadium in Pittsburgh, Pennsylvania and the home of the Pittsburgh Steelers

People

 * H. F. Verwoerd, a South African Prime Minister
 * Harrison Ford, American film actor

Other uses

 * Have Fun, in video game slang
 * High five, celebratory hand gesture
 * Hotfix, a software patch to temporarily fix a bug in a product