| Subject | English | Spanish |
| el. | Fahy simplex permeameter | permeámetro simplex de Fahy |
| transp., mech.eng. | flap simplex bevel gearbox | engranaje en ángulo simple de flaps |
| med. | herpes simplex cornealis | herpes simple corneal (herpes corneae, keratitis dendritica) |
| health. | Herpes simplex infection | infección por herpes simple |
| med. | herpes simplex of lips | herpes febril |
| med. | herpes simplex of lips | herpes labial |
| virol. | herpes simplex virus | virus del herpes |
| med. | herpes simplex virus | herpesvirus hominis |
| health. | herpes simplex virus HSV | virus de herpes simple (VHS) |
| med. | Herpes simplex virus | virus Herpes simplex (Herpesvirus hominis) |
| health. | herpes simplex virus I | virus herpes simple I |
| health. | herpes simplex virus II | virus herpes simple II |
| health. | Herpes Simplex virus infection | infección por herpes simple |
| med. | lichen simplex chronicus | liquen de Vidal (lichen simplex circumscriptus) |
| med. | lichen simplex chronicus | neurodermatitis (lichen simplex circumscriptus) |
| med. | lichen simplex chronicus | enfermedad de Vidal (lichen simplex circumscriptus) |
| commun. | radiotelephony on a simplex basis | radiotelefonía simplex |
| commun. | reversible simplex operation | explotación simplex reversible |
| IT | simplex algorithm | algoritmo del símplex |
| stat. | simplex algorithm | simple algoritmo |
| commun. | simplex bearer | portador simple |
| mech.eng. | simplex burner | quemador simple |
| med. | simplex carcinoma | carcinoma simple (carcinoma simplex) |
| stat. | simplex centroid design | diseño centroide símplex |
| math. | simplex centroid design | desiño simplex del centroide |
| commun. | simplex channel | canal símplex |
| commun. | simplex channel | canal unidireccional |
| commun., el. | simplex circuit | circuito fantasma |
| commun. | simplex com | comunicación unidireccional |
| commun. | simplex com | circuito símplex |
| stat. | simplex designs | diseños basados en el símplex |
| math. | simplex designs | diseños simplex |
| textile | simplex fabric | tricot simplex |
| industr., construct. | simplex fabric | tejido símplex |
| el. | simplex frequency | frecuencia simplex |
| textile | simplex knitting machine | telar simplex |
| mech.eng., el. | simplex lap winding | devanado imbricado paralelo |
| el.mot. | simplex lap winding | devanado imbricado simple |
| industr., construct. | Simplex machine | telar Simplex de dos fonturas |
| stat. | simplex-method | método simplex |
| IT | simplex method | técnica del símplex |
| IT | simplex method | algoritmo del símplex |
| stat. | simplex method | método símplex |
| math. | simplex method | método simplex |
| med. | simplex mode | modo simplex |
| math. | simplex models | modelos simplex |
| geogr. | simplex name | nombre propio simple |
| avia. | simplex nozzles | boquillas simplex |
| commun. | simplex, one-frequency operating mode | modo de funcionamento simplex con una frecuencia |
| commun. | simplex operation | explotación en símplex |
| commun., IT | simplex paper | papel simple |
| earth.sc., mech.eng. | simplex pump | bomba simplex de acción directa |
| commun. | simplex radio equipment | equipo radioeléctrico simplex |
| IT | simplex signaling | señalización en símplex |
| IT | simplex signalling | señalización en símplex |
| med. | simplex solid carcinoma | carcinoma sólido conjuntivo-epitelial (carcinoma solidum simplex) |
| commun., IT | simplex state | estado del modo de explotación símplex |
| IT | simplex supervision | supervisión en símplex |
| el. | simplex transmission | transmisión simplex |
| mech.eng., el. | simplex wave winding | devanado ondulado serie |
| el.mot. | simplex wave winding | devanado ondulado simple |
| commun. | two-way simplex system | sistema símplex de dos canales |