| Subject | English | Spanish |
| commun. | geographically unique identity | identificativo geográfico único |
| comp., MS | globally unique identifier | identificador único global (A 16-byte value generated from the unique identifier on a device, the current date and time, and a sequence number. It is used to identify a particular device, component, user, or session) |
| comp., MS | globally-unique identifier | identificador único global (A 16-byte value generated from the unique identifier on a device, the current date and time, and a sequence number. It is used to identify a particular device, component, user, or session) |
| commun. | globally unique identity | identificativo global único |
| comp., MS | locally-unique identifier | identificador único local (A 64-bit value that is guaranteed to be unique on the operating system that generated it until the system is restarted) |
| commun. | locally unique identity | identificativo único local |
| comp., MS | Microsoft .NET Passport unique identifier | identificador único de Microsoft .NET Passport (A unique identifier used to represent a Passport account) |
| org.name. | Open-ended International Meeting of Experts on the Special Needs and Requirements of Developing Countries with Low Forest Cover and Unique Types of Forests | Reunión internacional de expertos de participación abierta sobre las necesidades de los países en desarrollo que tienen cubiertas forestales reducidas y tipos singulares de bosques |
| comp., MS | organizationally unique identifier | identificador único de organización (An unique identifier assigned to organizations and managed by the IEEE) |
| UN, biol., sec.sys. | persistent global unique identifiers | identificadores exclusivos mundiales persistentes |
| commun., IT | reference unique word | palabra única de referencia |
| el. | unique abbreviated dialing | marcación abreviada individual |
| el. | unique abbreviated dialling | marcación abreviada individual |
| fin. | unique adjacent position | fenómeno de contigüidad único |
| UN, polit. | unique basis for further negotiations | base excepcional para celebrar ulteriores negociaciones |
| math. | unique factor | factor único |
| light. | unique hue | tono unitario |
| comp., MS | unique ID | Id. exclusivo (A number used as a unique identifier for each Windows Live ID holder. This number is disclosed to residents of the European Union to comply with EU privacy regulations) |
| comp., MS | unique identifier | identificador único (A 16-byte value generated from the unique identifier on a device, the current date and time, and a sequence number. It is used to identify a particular device, component, user, or session) |
| IT, dat.proc. | unique identifier | identificador exclusivo |
| comp., MS | unique identifier | identificador único (A 16-byte value generated from the unique identifier on a device, the current date and time, and a sequence number. It is used to identify a particular device, component, user, or session) |
| comp., MS | unique index | índice único (An index in which no two rows are permitted to have the same index value, thus prohibiting duplicate index or key values) |
| health., anim.husb. | unique life number | número permanente único |
| health., anim.husb. | unique life number | número permanente equino universal |
| IT | unique name assumption | hipótesis del nombre único |
| meteorol. | Unique Payload Services | servicios exclusivos de carga útil |
| comp., MS | unique permission | permiso exclusivo (A permission setting for using a list, library, or site that is different from the permission settings of its parent site) |
| commun., IT | unique postal name | nombre postal exclusivo |
| fin. | unique price | precio único |
| comp., MS | Unique Program Identifier | identificador único de programa (A 21-character identifier used to identify computers enabled by FlexGo technology product models and locales for a specific solution provider) |
| genet. | unique sequence | secuencia única |
| el. | unique serial number | número de serie único |
| IT | unique word | palabra única |
| sat.comm. | unique word in TDMA | palabra particular en AMDT |
| econ. | units characterised by a unique activity | unidades que se caracterizan por una actividad exclusiva |
| chem. | Universal Unique Identifier | Identificador Universal Único |
| comp., MS | universally unique identifier | identificador único universal (A 16-byte value generated from the unique identifier on a device, the current date and time, and a sequence number. It is used to identify a particular device, component, user, or session) |
| med., pharma. | worldwide unique case identification number | número de identificación del caso, único en el mundo |