| Subject | English | Italian |
| scient. | bi-unique | biunivoco |
| commun. | geographically unique identity | identificazione geografica unica |
| comp., MS | globally unique identifier | identificatore univoco globale (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 | identificatore univoco globale (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 | identificazione globale unica |
| comp., MS | locally-unique identifier | identificatore univoco locale (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 | identificazione locale unica |
| comp., MS | Microsoft .NET Passport unique identifier | identificatore univoco Microsoft .NET Passport (A unique identifier used to represent a Passport account) |
| comp., MS | organizationally unique identifier | Organizationally Unique Identifier (An unique identifier assigned to organizations and managed by the IEEE) |
| commun., IT | reference unique word | parola unica di riferimento |
| astr. | unique creation | creazione unica |
| health., med. | unique device identification | identificazione unica del dispositivo |
| health., med. | unique device identifier | identificazione unica del dispositivo |
| math. | unique factor | fattore unico |
| light. | unique hue | tinta unitaria |
| comp., MS | unique ID | ID univoco (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) |
| gen. | unique identification | identificazione univoca |
| IT, dat.proc. | unique identifier | identificatore unico |
| comp., MS | unique identifier | identificatore univoco (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 | indice univoco (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 | numero unico di identificazione a vita |
| IT | unique name assumption | ipotesi del nome unico |
| comp., MS | unique permission | autorizzazione esclusiva (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 | nome postale unico |
| fin. | unique price | prezzo unico |
| comp., MS | Unique Program Identifier | identificatore univoco di programma (A 21-character identifier used to identify computers enabled by FlexGo technology product models and locales for a specific solution provider) |
| el. | unique serial number | numero di serie unico |
| electr.eng. | unique type reference for accessories | riferimento di tipo unico |
| IT | unique word | parola unica |
| sat.comm. | unique word in TDMA | parola di riferimento |
| econ. | units characterised by a unique activity | attività caratterizzate da un'attività unica |
| chem. | Universal Unique Identifier | identificatore unico universale |
| comp., MS | universally unique identifier | identificatore univoco universale (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) |