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

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

Education

• Higher Preparatory Examination (HF) (Højere Forberedelseseksamen), a Danish examination programme
• Heraldo Filipino, the student newspaper of De La Salle University-Dasmariñaslol, 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

Science and technology

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, 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

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