RH

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

Companies

• Red Hat, 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, a measure of current versus potential humidity
• Releasing hormone
• Reproductive health
• Rh blood group system (Rhesus factor), a classification to describe human blood types
• Rhodium, symbol Rh, a chemical element
• R_H, the Rydberg constant for hydrogen
• Riemann hypothesis, an important unsolved problem in mathematics
• Adobe RoboHelp, an Adobe software

Places

• RH postcode area, in the UK
• Republika Hrvatska, an official name of Croatia in Croatian
• Ruttonjee Hospital, a hospital in Wan Chai, Hong Kong

Other uses

• Rh (digraph)
• The Right Honourable, an honorific preceding a name in the UK
• Radical honesty, the practice of complete honesty
• DZRH News Television, a news channel in the Philippines previously known as RHTV
• Richmond Hill line (RH), of the GO Transit rail network in Ontario, Canada

See also

• DZRH, a Philippine radio station