A grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons

3 to 30 megahertz

A colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride; solutions in water are hydrofluoric acid

Inability of the heart to pump enough blood to sustain normal bodily functions

A weak poisonous liquid acid; formed by solution of hydrogen fluoride in water

In computational physics and chemistry, the Hartree–Fock method is a method of approximation for the determination of the wave function and the energy of a quantum many-body system in a stationary state.

Factor H is a member of the regulators of complement activation family and is a complement control protein.

Royal Air Force Horsham St Faith or more simply RAF Horsham St Faith is a former Royal Air Force station near Norwich, Norfolk, England which was operational from 1939 to 1963.

Hemofiltration, also haemofiltration, is a renal replacement therapy which is used in the intensive care setting.

Health trust or HF is a health enterprise owned by one of the four regional health authorities in Norway, with responsibility for performing a geographic and/or specialist activities of operations on behalf of the regional health authority.

Helicon Filter, also referred to as Helicon, Filter, or as HF, was a proprietary commercial and shareware photo editing software program for Microsoft Windows, similar to such programs as Adobe Photoshop and GIMP, developed and published by Helicon Soft Ltd. Unlike these other programs, Helicon Filter is designed primarily to edit and improve existing photos and not for graphics creation.

Henry Field was an American businessman and philanthropist.

Dai Okazaki, more commonly known by his stagename Smelly, is a Japanese comedic performer and former manga artist.