RH, Rh, rH, or rh may refer to:
Companies
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Red Hat
Red Hat, Inc. (formerly Red Hat Software, Inc.) is an American software company that provides open source software products to enterprises and is a subsidiary of IBM. Founded in 1993, Red Hat has its corporate headquarters in Raleigh, North ...
, an American software company
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Republic Express Airlines (IATA designator), a cargo airline in Indonesia
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RH (company), an American furniture chain formerly known as Restoration Hardware
Science and technology
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Relative humidity
Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. Humidity indicates the likelihood for precipitation (meteorology), precipitation, dew, or fog t ...
, the ratio of the partial pressure of water vapor to the equilibrium vapor pressure of water at a given temperature
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Releasing hormone
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Reproductive health
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Rh blood group system (''Rhesus factor''), a classification to describe blood types in humans
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Rhodium, symbol Rh, a chemical element
* R
H, the
Rydberg constant for hydrogen
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Riemann hypothesis
In mathematics, the Riemann hypothesis is the conjecture that the Riemann zeta function has its zeros only at the negative even integers and complex numbers with real part . Many consider it to be the most important unsolved problem in pure ...
, an important unsolved problem in mathematics
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Adobe RoboHelp, an Adobe software
Places
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RH postcode area, in the UK
* , an official name of Croatia in Croatian
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Other uses
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Rh (digraph)
This is a list of digraphs used in various Latin alphabets. In the list, letters with diacritics are arranged in alphabetical order according to their base, e.g. is alphabetised with , not at the end of the alphabet, as it would be in Danish ...
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The Right Honourable
''The Right Honourable'' (abbreviation: The Rt Hon. or variations) is an honorific Style (form of address), style traditionally applied to certain persons and collective bodies in the United Kingdom, the former British Empire, and the Commonwealt ...
, an honorific preceding a name in the UK
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Radical honesty, the practice of always being completely honest and refraining from telling even white lies
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DZRH News Television, a news channel in the Philippines previously known as RHTV.
See also
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DZRH, a Philippine radio station
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Royal Hospital (disambiguation)
{{disambiguation, geo