RH, Rh, rH, or rh may refer to:

Companies

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 * Republic Express Airlines (IATA designator), a cargo airline in Indonesia * RH (company), an American furniture chain formerly known as Restoration Hardware

Science and technology

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 *

Releasing hormone Releasing hormones and inhibiting hormones are hormones whose main purpose is to control the release of other hormones, either by stimulating or inhibiting their release. They are also called liberins () and statins () (respectively), or releasing ...

Reproductive health Sexual and reproductive health (SRH) is a field of research, health care, and social activism that explores the health of an individual's Human reproductive system, reproductive system and sexual well-being during all stages of their life. Se ...

* Rh blood group system (''Rhesus factor''), a classification to describe blood types in humans *

Rhodium Rhodium is a chemical element; it has symbol Rh and atomic number 45. It is a very rare, silvery-white, hard, corrosion-resistant transition metal. It is a noble metal and a member of the platinum group. It has only one naturally occurring isot ...

, symbol Rh, a chemical element * R_H, the Rydberg constant for hydrogen *

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 *

Adobe RoboHelp Adobe RoboHelp is a help authoring tool developed and published by Adobe Inc. for Windows. RoboHelp was created by Gen Kiyooka, and Blue Sky Software released version 1.0 in January 1992. Blue Sky Software was founded in 1990 and changed its n ...

, an Adobe software

Places

RH postcode area The RH postcode area, also known as the Redhill postcode area,Royal Mail, ''Address Management Guide'', (2004) is a group of twenty postcode districts in South East England, within seventeen post towns. These cover east Surrey (including Redhil ...

, in the UK * , an official name of Croatia in Croatian *

Other uses

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 ...

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 *

Radical honesty Radical honesty (RH) is the practice of complete honesty without telling even white lies. The phrase was trademarked in 1997 as a technique and self-improvement program based on the 1996 bestselling book ''Radical Honesty'' by Brad Blanton."Rad ...

, the practice of always being completely honest and refraining from telling even white lies *

DZRH News Television DZRH News Television (stylized as DZRHTV or RHTV in capital letters) is a Philippine pay television news channel owned by MBC Media Group. Its programs are primarily from MBC Media Group's flagship radio station DZRH and station-produced pro ...

, a news channel in the Philippines previously known as RHTV.

Companies

Science and technology

Places

Other uses

See also