| Subject | English | Italian |
| weld. | external cooling system | sistema di raffreddamento esterno |
| comp., MS | external delivery system | sistema di recapito esterno (A system, such as Microsoft Exchange Server, that delivers formatted notifications to destination devices) |
| comp., MS | external source system | sistema di origine esterno (A data repository, such as a data warehouse, data mart, or OLTP system, that is outside a specific deployment) |
| comp., MS | External System | sistema esterno (A supported source of data that can be modeled by Business Connectivity Services, such as a database, Web service, or custom .NET Framework assembly) |
| transp. | external transit system | regime del transito esterno |
| phys.sc. | external vacuum system | sistema esterno a vuoto |
| immigr. | Integrated External Surveillance System | Sistema integrato di vigilanza esterna |
| gen. | integrated management system for external borders | sistema integrato di gestione delle frontiere esterne |
| lab.law. | system permitting connection to an external device | sistema di collegamento raccordabile ad un dispositivo esterno |