Ro or RO may refer to:
Organizations[edit]
- Ro (company), an American telehealth company
- Red Orchestra (espionage), a series of Soviet spy rings
- Reserve Officers' Training Corps, an American armed forces training program
- Royal Ordnance, a British armaments manufacturer
- Reach Out (non-profit), an Australian information website
- TAROM, a Romanian airline
Places[edit]
- Rø, Denmark
- Ro, Emilia-Romagna, Italy
- Ro, Greece, a small Greek island
- Rö Church, in Stockholm County, Sweden
- Romania (ISO 3166-1 country code RO)
- Rondônia, Brazil
Science and technology[edit]
- .ro, the top level internet 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
- Relaxation oscillator, an electronic oscillator
- Reverse osmosis, a filtration method
- Read-only access, a computer software attribute
- Receive only, a type of teleprinter
Other[edit]
- Ro language, an a priori constructed language
- Ro (kana), a Japanese character
- Ro (title), a Fijian title of nobility
- Ro (video game), a 2008 IOS puzzle game
- Romanian language
- Ro (dubious Danish king)
- Ro (pharaoh) (fl. 32nd century BC), Egyptian pharaoh
- Ro (name)
- Range Officer, supervising a shooting range
- Renewables Obligation (United Kingdom), a British order requiring renewable electricity generation
- Restraining order, a legal injunction
- A shortened variety of the first name Rohit
- Residentie Orchestra, Dutch Orchestra based in Den Haag
- Rogue One, a 2016 Star Wars film
See also[edit]
- R0 (disambiguation)
- Rho (disambiguation)
- ROH (disambiguation)
- Roll-on/roll-off, ships designed to carry wheeled cargo