CH, Ch, cH, or ch may refer to:
Arts and entertainment CollegeHumor, a comedy website CH (television system), a defunct Canadian television system later known as E!
Businesses Bemidji Airlines (IATA code CH) A product line by Carolina Herrera (fashion designer)
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 Continuum hypothesis, in set theory 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 Congenital hypothyroidism, a condition of thyroid hormone deficiency present at birth French catheter scale (Charrière), a scale for medical catheters, also abbreviated as Fr Children's hospital
Military technology Chain Home, a World War II radar array
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 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), any 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 Charlotte Hornets, a professional basketball team in the NBA