| Subject | English | Spanish |
| IT | aleph null | alef cero |
| el. | area of the null region | zona del nulo |
| earth.sc. | aural null | zona de silencio |
| transp. | aural null | zona de silencio radio |
| radio | aural null | recepción nula |
| tech. | aural null | nivel inaudible (de una señal radial) |
| earth.sc. | aural null-method | método auditivo de cero |
| automat. | automatic null-balancing potentiometer | potenciómetro de equilibrio automático de cero |
| polit. | ballot papers null and void | papeletas de voto nulas y en blanco |
| commun. | bearing null | nulo de las marcaciones |
| tech. | bessel null method | método bessel de indicación nula |
| law | clause which is null and void | nulidad del negocio |
| commun. | closed-loop null-seeking system | sistema buscador de nulos de bucle cerrado |
| antenn. | directional null | mínimo direccional |
| antenn. | directional-null antenna | antena de mínimo direccional |
| commun. | direction-finding signal null | radiogoniometría por anulación de la señal |
| tech., el. | electrical null | cero eléctrico |
| tech., el. | electrical null position | posición cero eléctrico |
| IT, dat.proc. | management of null values | gestión de valores nulos |
| math. | non-null hypothesis | hipótesis alternativa |
| stat., scient. | non-null hypothesis | hipótesis de no nulidad |
| math. | non-null hypothesis | hipótesis no nula |
| patents. | null and void | nulo y como no formulado |
| law | null and void invalid, without legal force | nulo |
| law | null and void | nulo y sin efecto |
| law | null and void | nulo |
| law | null and void invalid, without legal force | nulo y sin valor |
| law | null and void | nulo |
| el. | null astatic magnetometer | magnetómetro astático indicador de cero |
| CNC | null balance device | dispositivo equilibrador automático |
| meas.inst. | null balance instrument | aparato indicador de cero |
| earth.sc., mech.eng. | null bias | desfase del cero |
| med. | null cell | célula nula |
| comp., MS | null character | carácter nulo (" A character code with a null value; literally, a character meaning "nothing." Although it is real in the sense of being recognizable, occupying space internally in the computer, and being sent or received as a character, a NUL character displays nothing, takes no space on the screen or on paper, and causes no specific action when sent to a printer. In ASCII, NUL is represented by the character code 0. ") |
| IT, tech. | null character string | cadena nula |
| el. | null-coil magnetometer | magnetómetro de bobina compensadora |
| commun., el. | null detector | indicador de cero |
| commun., el. | null detector | detector de cero |
| tech. | null detector or indicator | indicador de corriente nula |
| tech. | null detector or indicator | indicador de corriente cero |
| chem. | null electrode | electrodo de potencial cero |
| pharma. | Null hypothesis | Hipótesis nula |
| math. | null hypothesis | hipótesis nula |
| math. | null hypothesis | hipótesis de nulidad |
| commun., el. | null indicator | indicador de cero |
| commun., el. | null indicator | detector de cero |
| IT | null information | información nula |
| IT | null information | información cero |
| el., meas.inst. | null instrument | aparato indicador de cero |
| stat. | null integer | número entero nulo |
| comp., MS | null key | clave NULL (A null value that is encountered in a key column) |
| earth.sc., mech.eng. | null leakage | fugas en reposo |
| el., meas.inst. | null method of measurement | método de medida por cero |
| textile | null method | método de corriente nula |
| meas.inst. | null method | método de cero |
| tech. | null method of measurement | método de medición por cero |
| tech. | null method of measurement | método de cero |
| tech. | null method of measurement | medición por cero |
| meas.inst. | null method permeameter | permeámetro de método de cero |
| stat. | null model | modelo nulo |
| IT | Null Modem | módem nulo |
| IT | null modem | módem nulo |
| comp., MS | null modem | módem nulo (Special cabling that eliminates the modem's need for asynchronous communications between two computers over short distances. A null modem cable emulates modem communication) |
| IT | null modem cable | cable de módem nulo |
| comp., MS | null object | objeto null (An object with no members) |
| automat. | null off-set | regulación astática |
| tech. | null orifice | orificio nulo |
| commun., IT | null-placing technique | técnica de posicionamiento de nulos |
| tech. | null plate | placa nula |
| tech. | null position | punto de audición mínima |
| astronaut. | null position | posición nula |
| meas.inst. | null position | posición cero |
| earth.sc., mech.eng. | null pressure | presión en el cero |
| math. | null recurrent state | estructura recurrente nula |
| comp., MS | null reference | referencia nula (In C++, a reference that has not been assigned an object) |
| tech. | null-reference glide path | trayectoria de planeo de referencia cero |
| earth.sc., mech.eng. | null region | zona del cero |
| earth.sc., mech.eng. | null region | región nula |
| el. | null seeking system | sistema de búsqueda par ceros |
| life.sc. | null segregant | segregante negativo |
| tech. | null shift | desplazamiento del cero |
| tech. | null shift | deriva del cero |
| IT | null-space | subespacio ortogonal |
| IT | null-space | subespacio de nulos |
| commun., el. | null-steerable antenna | antena de nulo direccionable |
| antenn. | null-steering antenna | antena de mínimo orientable |
| IT, tech. | null string | cadena nula |
| chem. | null valence | nulivalencia |
| chem. | null valence | valencia nula |
| commun., IT | null-zone threshold | umbral vecino de cero |
| el. | offset voltage null-capability | capacidad de anulación de tensión de equilibrio |
| el. | sharp null | cero bien marcado |
| tech. | signal amplitude null | amplitud de señal nula |
| el. | spectral null | punto de anulación de un espectro |
| commun. | state U0 "Null" | U0 estado nulo |
| commun. | state U0 "Null" | estado U0 "nulo" |
| transp., avia., mater.sc. | synchro null pulses curve | curva SNP |
| IMF. | the null | hipótesis nula |
| commun. | U0 null state | estado U0 "nulo" |
| commun. | U0 null state | U0 estado nulo |
