| Subject | Spanish | English |
| commun., el. | acoplamiento R-C | R-C coupling |
| commun., el. | acoplamiento R-C | resistance-capacitance coupling |
| tech. | ajuste de las r.p.m. del regulador | governor rpm set |
| IT | biestable R-S-T | R-S-T flip-flop |
| transp., nautic. | chalana R.H.K. | towing pulley |
| org.name. | Comité de Examen del Premio B.R. Sen | B.R. Sen Award Review Committee |
| tech. | conmutación de R-F | R-F switching (radio frecuencia) |
| comp., MS | estilo de referencia R1C1 | R1C1 reference style (" A convention for referencing the location of cells in a worksheet in which both the rows and the columns on the worksheet are numbered. The location of a cell is indicated with an "R" followed by a row number and a "C" followed by a column number.") |
| IT | excursión R.M.S. de frecuencia debida a la dispersión | dispersed R.M.S.deviation |
| IT, el. | flip-flop R-S | R-S flip flop |
| gen. | Gris se deletrea "G-R-A-Y" en Estados Unidos | Gray is spelled G-R-A-Y in the United States |
| gen. | informe M.A.D.R.I.D | M.A.D.R.I.D report |
| gen. | informe M.A.D.R.I.D | main assessment and description report for internal debate |
| med. | intervalo Q.R.S.T. | Q.R.S.T. interval |
| IMF. | n.r.s. | n.s.r. |
| IMF. | n.r.s. | not separately recorded |
| med. | neuralgia de R.Hunt | neuralgia of geniculate ganglion (zoster oticus) |
| med. | neuralgia de R.Hunt | Hunt's neuralgia (zoster oticus) |
| comp., MS | notación R1C1 | R1C1 notation (" A convention for referencing the location of cells in a worksheet in which both the rows and the columns on the worksheet are numbered. The location of a cell is indicated with an "R" followed by a row number and a "C" followed by a column number.") |
| agric., construct. | nuevo sistema de riegos de U.R.S.S. | U.S.S.R.new system of irrigation |
| meteorol. | oficina meteorológica del R.U. | UK Meteorological Office |
| antenn. | pentodo amplificador de R.F. de mu variable | variable-mu R. F. pentode |
| antenn. | pentodo amplificador de R.F., I.F. y A.F. | R.F., I.F. and A.F. penthode |
| chem. | Ponceau 4R, rojo cochinilla A | ponceau 4 R |
| chem. | Ponceau 4R, rojo cochinilla A | cochineal red A |
| chem. | Ponceau 4R, rojo cochinilla A | E 124 |
| org.name. | Premio B.R. Sen | B.R. Sen Award |
| pharma., engl. | r-cloprostenol | r-cloprostenol |
| med. | R-enzima | R-enzyme |
| insur. | R/I forma cerrada | risk index closing form |
| insur. | R/I forma cerrada | R/I closing form |
| insur. | R/I nota de pedido | risk index order form |
| insur. | R/I nota de pedido | R/I order form |
| tech. | r.p.m. | revolution per minute |
| tech. | r.p.m. | r.p.m |
| math. | R-proceso | R-process |
| tech. | R/s | R-s |
| tech. | R/s | 1 roentgen per second |
| law | R-UE/EU-R | RESTREINT UE/EU RESTRICTED |
| law | R-UE/EU-R | RESTREINT UE |
| demogr. | r y K selección | r and K selection |
| crim.law. | Recomendación R8715 de 17 de septiembre de 1987, del Comité de Ministros del Consejo de Europa, dirigida a regular la utilización de datos de carácter personal en el sector de la policía | Recommendation No. R8715 of 17 September 1987 of the Committee of Ministers regulating the Use of Personal Data in the Police Sector |
| commun., IT | registrador internacional R2 de salida | outgoing international R2 register |
| commun., IT | registrador R2 de llegada | incoming R2 register |
| commun., IT | registrador R2 de salida | outgoing R2 register |
| meteorol. | relación Z-R tropical | Tropical Z-R coefficient |
| tech. | régimen teórico de r.p.m. | design rpm (revoluciones por minuto) |
| agric. | sistema r-tex | r-tex system |
| comp., MS | valor R cuadrado | R-squared value (A number from 0 to 1 that reveals how closely the estimated values for the trendline correspond to your actual data. A trendline is most reliable when its R-squared value is at or near 1) |
| stat., phys.sc. | valor r.m.s. | root mean square |
| stat., phys.sc. | valor r.m.s. | root-mean-square value |
| stat., phys.sc. | valor r.m.s. | rms value |
| stat., phys.sc. | valor r.m.s. | R.M.S. value |
| stat., phys.sc. | valor r.m.s. | RMS value |
| stat., phys.sc. | valor r.m.s. | quadratic mean |
| agric. | vino de calidad P.D.R.blanco | white quality wines P.S.R. |
| agric., food.ind. | vino de calidad P.D.R.tinto/rosado | red/rosé quality wine P.S.R. |
| agric. | vinos de calidad P.D.R.-total | quality wines P.S.R.-total |
| agric. | v.l.c.p.r.d. vino de licor de calidad producido en una región determinada | quality liqueur wine psr |
| agric. | v.l.c.p.r.d. vino de licor de calidad producido en una región determinada | quality liqueur wine produced in a specified region |