CH
CH, Ch, cH, or ch may refer to: Arts and entertainment Television channel (sometimes abbreviated as "ch." for television and cable stations) Chaos;Head, a video game Clone Hero, a clone game version of popular rhythm game series Guitar Hero. CollegeHumor, a comedy website E!, a defunct Canadian television system that went by the name CH from 2001 to 2007 Businesses Bemidji Airlines (IATA code CH) Carolina Herrera, a fashion designer based in New York Columbia Helicopters, an aircraft manufacturing and operator company based in Aurora, Oregon, United States In language Ch (digraph), considered a single letter in several Latin-alphabet languages Chamorro language: ISO 639 alpha-2 language code (ch) Science and technology Chemistry The methylidyne radical (a carbyne); CH• (or •CH), CH3• (or ⫶CH) The methylidyne group ≡CH The methine group (methanylylidene, methylylidene) =CH− Mathematics and computing Chomsky hierarchy, in computer science, a containment hierarchy of classes of formal grammars Continuum hypothesis, in set theory Hyperbolic cosine, in mathematics, a hyperbolic function, ch(x) = cosh(x) Curry–Howard correspondence, the relationship between computer programs and mathematical proofs CH register, the high byte of an X86 16-bit CX register Ch (computer programming), a cross-platform C/C++ interpreter Contraction hierarchies, in computer science, a speed-up technique for finding shortest paths in a graph Medicine Cholesterol Cluster headache Congenital hypothyroidism, a condition of thyroid hormone deficiency present at birth Cerebellar hypoplasia, characterized by reduced cerebellar volume Cerebellar hypoplasia (non-human) French catheter scale (Charrière), a scale for medical catheters, also abbreviated as Fr Children's hospital Military technology Cargo helicopter (U.S. military helicopter alpha-numeric prefix) Chain Home, a World War II radar array Heavy cruiser (U.S. Navy ship code CH, standing for "Cruiser, Heavy") In other sciences Clay of high plasticity (USCS soil type CH) Cassini-Huygens Places Confoederatio Helvetica, the formal name for Switzerland, Latin in origin ISO country code for Switzerland .ch, the Internet country code top-level domain for Switzerland CH postcode area; the Chester postcode area in the UK Chihuahua (state), the State of Chihuahua, Mexico Conservation Halton, in Ontario, Canada China (FIPS and NATO country code CH) Chandigarh, a union territory of India Chapel Hill, North Carolina Other uses Chain (length), a unit of linear measure in the Imperial system Championship (dog), a dog qualifying for a championship at a conformation show, prefixed "Ch." Christ's Hospital, Horsham, West Sussex Companion of Honour, a British and Commonwealth honour Chaudhary, an honorific used in the Indian and Pakistani Punjab regions Metres above the Sea (Switzerland), an elevation reference system The logo for the Montreal Canadiens ice hockey team Adobe Character Animator, an Adobe software