R&A : Royal and Ancient Golf Club of St Andrews.
RCA : Racecourse Association.
RCD : Residual Current Device.
REACH Regulation : Registration, Evaluation, Authorisation and Restriction of Chemicals Regulation.
RFI : Request for Information.
RFID : Radio Frequency Identifrication.
RFL : Rugby Football League, formed in 1895.
RFP : Request for Proposal.
RFQ : Request for Quotation.
RFT : Request for Tender.
RGR : Relative Growth Rate.
RIDDOR : Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 2013.
ROI : Return On Investment.
ROLO : Register of Land Based Operatives.
ROPS : Roll-Over Protective Structures.
RPE : Respiratory Protective Equipment.
RPR : Regenerating Perennial Ryegrass.
RQF : Regulated Qualifications Framework, for England and Northern Ireland.
RTU : Ready To Use.
RTV : Rough Terrain Vehicle.