(ISO 639-2 code) RON – (s) Romanian new leu (ISO 4217 currency code) ROP – (i) Render Output Pipeline ROPE – Research Opportunity and Performance Evidence RORO OR ro-ro – (a) Roll-On/Roll-Off (ferry) ROS – (i) Reactive Oxygen Species ROTC – (i) Reserve Officer Training Corps ("Rawt-Cee") ROU – (s) Romania (ISO 3166 trigram) ROV – (i) Remotely Operated Vehicle ROW – (i) Right Of Way – Rest Of the World ROWPU – (a) Reverse Osmosis Water Purification Unit ("roe-pew") ROY G BIV – colors of the prism; Red, Orange, Yellow, Green, Blue, Indigo, Violet ROZ – (a/i) Restricted Operations Zone RP RP (s) Philippines (FIPS 10-4 country code) (i) Release Point Role-Playing [relationship potential] RPA – (i) Regional Plan Association RPD – (i) Recognition-Primed Decision-making RPF – (i) Rwandan Patriotic Front RPG (i) (US-CA) Regional Planning Group Report Program Generator Rocket Projectile Gun Rocket-Propelled Grenade Role-Playing Game RPI (i) Rating percentage index, a metric used in the selection of teams for many (U.S.) NCAA college sports tournaments Rensselaer Polytechnic Institute Retail price index, measure of inflation in the UK RPL – (i) Reverse Polish Lisp rpm – (s) revolutions per minute RPM (i) Rebated Precision Magnum, a family of rifle cartridges manufactured by Weatherby Records, Promotion, Music (expansion of the title of a former Canadian music magazine) Red Hat Package Manager RPN – (i) reverse Polish notation RPO (i) Radiation Protection Officer Regular Production Option Run-pass option, an offensive scheme in American football RPR FOM – (i/a) Realtime Platform Reference Federation Object Model ("reaper fomm") rps – (s) revolutions per second RPV – (i) Remotely Piloted Vehicle RQ RQ – (s) Puerto Rico (FIPS 10-4 territory code) RR R&R – (i) Rest & Relaxation RRB – (i) Railroad Retirement Board RRN – (i) Recurrence Rate Number RRP – (i) Recurrent Respiratory Papillomatosis RRS – (i) Racing Rules of Sailing RRSP – (i) Registered Retirement Savings Plan (Canada; roughly equivalent to the IRA in the U.S.) RS RS – (s) Russia (FIPS 10-4 country code) R&S – (i) Reconnaissance & Surveillance R/S – (i) Respectfully Submitted RSA (i) Regimental Support Area Republic of South Africa Rivest-Shamir-Adleman encryption (s) South Africa (IOC and FIFA trigram, but not ISO 3166) RSD (i) Reflex Sympathetic Dystrophy (s) Serbian dinar (ISO 4217 currency code) RSEQ – (i) Réseau du sport étudiant du Québec (French, "Quebec Student Sports Network") RSI – (i) Repetitive Strain Injury