The Ror is a caste found mainly in northern India. Ror, ROR or RoR may also refer to: People Dalel Singh Ror, Indian volleyball player Ror Wolf (born 1932), German writer and artist Places ROR, the IATA code for Palau International Airport Ror River, tributary of the Târnava Mică River in Romania Business Rate of return, profit on an investment over a period of time Ripoff Report, a consumer advocacy website Run of River Power, a Canadian hydro power company Organizations Reach Out and Read, an American non-profit organization Reaching Out Romania, a Romanian non-governmental charitable organization Regiment Oranjerivier, an armoured regiment of the South African Army Research-on-Research Committee, a nonprofit association Research Organization Registry, a database of research organizations Retraining of Racehorses, an animal welfare organization in the United Kingdom Rhythms of Resistance, a network of political percussion bands Science and technology Biology and chemistry R-O-R, general formula for ethers, a class of organic compounds ROR, abbreviation for RAR-related orphan receptor, a family of nuclear receptors in molecular biology ROR, abbreviation for receptor tyrosine kinase-like orphan receptors, a family of cell surface receptors ROR, abbreviation for risk of recurrence Computing Resources of a Resource, an XML format for describing common website objects to search engines Rigs of Rods, a multi-simulation game which uses soft-body physics ROtate Right, a common circular shift instruction in assembly language Ruby on Rails, a server side Web application framework Other uses Review of Religions, a comparative religious magazine in print since 1902 RoR, common police shorthand for Released on own Recognizance RoR, a common abbreviation for Record of Ragnarok Rule of Rose, a 2006 Japanese video game Run-of-the-river hydroelectricity See also RooR, a German glass bong company