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''''HF''', '''Hf''' or '''hf''' can refer to: {{tocright}😬😄} ==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 * ''[[Heraldo Filipino]]'', the official student newspaper of De La Salle University-Dasmariñaslol ==In business== * HF (hlutafélag), in Iceland, a form of [[limited liability company]] * [[Hapag-Lloyd Flug]], a German airline (IATA code) doing business as TUIfly * [[Hedge fund]] ==In education== * [[Higher Preparatory Examination (HF)]] ("Higher Preparatory Examination"), a Danish examination programme * ''[[Heraldo Filipino]]'', the official student newspaper of De La Salle University-Dasmariñas * [[Homewood-Flossmoor High School]] ==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, HF), a presenter of the [[ZAI Awards]] ==Science and technology== ===Biology and medicine=== * [[Heart failure]] * [[Holstein Friesian cattle]], HF, a breed of cattle ===Chemistry=== * [[Hafnium]], 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 positions#Centre half-forward|Australian Rules football position]] * [[Heinz Field]], a stadium in Pittsburgh, Pennsylvania and the home of the Pittsburgh Steelers ==Other uses== * Have Fun, in [[Internet slang]] * [[High five]], celebratory hand gesture * [[Hotfix]], a software patch to temporarily fix a bug in a product {{disambiguation}}'