Ro or RO may refer to:

Businesses and organizations

  • Ro (company), an American telehealth company
  • Royal Ordnance, a British armaments manufacturer
  • TAROM, a Romanian airline, IATA airline code RO

Places

  • Rø, Denmark
  • Ro, Emilia-Romagna, Italy
  • Ro, Greece, a small Greek island
  • Romania (ISO 3166-1 country code RO)

Science and technology

  • .ro, Internet country code top-level domain for Romania
  • Ro (antigen)
  • Autoantigen Ro, a protein
  • Ro (volume), an Egyptian unit of measurement
  • Radio occultation, a technique for measuring the properties of an atmosphere
  • Reactor operator, a person who controls a nuclear reactor
  • Reverse osmosis, a water purification process
  • Receive only, a type of teleprinter
  • Anti-SSA/Ro autoantibodies (anti–Sjögren's-syndrome-related antigen A autoantibodies)

Other uses

  • Ro (kana), a Japanese character
  • Ro (name), a given name, nickname and surname
  • Ro (dubious Danish king)
  • Ro (pharaoh) or Iry-Hor (fl. c. 3170 BC), Egyptian pharaoh
  • Ro (title), a Fijian title of nobility
  • Ro (video game), 2008
  • Ro language, a constructed language
  • Rö Church, in Stockholm County, Sweden
  • Romanian language, ISO 639-1 language code ro
  • Range Officer, supervising a shooting range
  • Renewables Obligation (United Kingdom), a British order requiring renewable electricity generation

See also

  • R0 (disambiguation)
  • Rho (disambiguation)
  • ROH (disambiguation)
  • Roll-on/roll-off, or RORO, cargo ships carrying wheeled cargo
  • Assamese rô, a character distinctive to the Assamese alphabet