RH

RH, Rh, rH, or rh may stand for:

Arts and entertainment

• Radiohead, an English alternative rock, electronica and experimental music band
• Rubeus Hagrid, a character in the Harry Potter series
• Rumbling Hearts, an anime
• Rush Hour (film series)
• Ryan's Hope, a soap opera

Businesses and organizations

• Republic Express Airlines (IATA airline designator)
• Restoration Hardware, an American furniture chain of home furnishings, hardware, and outdoor and garden products
• Royal Hospital (disambiguation)

People

• Reinhard Heydrich, chief of the Reich Security Main Office in Nazi Germany
• Robert Heinlein, author
• Robin Hood, a heroic outlaw in English folklore
• Rolf Harris, Australian entertainer
• Ron Howard, actor

Science, technology, and mathematics

• Red Hat, a GNU/Linux operating system
• Relative humidity, the amount of water vapor that exists in a gaseous mixture of air and water vapor
• Releasing hormone
• Reproductive health
• Rh blood group system, a classification to describe blood types in humans
• Rhodium, a chemical element
• Riemann hypothesis, an important unsolved problem in mathematics
• Rydberg Constant for hydrogen (R_H)

Other uses

• Rh (digraph)
• RH postal area, UK, in the United Kingdom Royal Mail postcode system
• Right-handed
• The Right Honourable, an honorific preceding a name
• Rush hour, the two parts of the day with busy traffic caused by commuting