| Subject | English | Spanish |
| IT | European Source Ter m Code System | European Source Term Code System |
| comp., MS | external source system | sistema de origen externo (A data repository, such as a data warehouse, data mart, or OLTP system, that is outside a specific deployment) |
| transp. | point source system | sistema de fuente puntual |
| comp., MS | source system | sistema de origen (The system in which application and metadata reside before they are migrated to a different one) |
| commun. | source-coding system | sistema de codificación de la fuente |
| comp., MS | System Data Source Name | nombre de origen de datos del sistema (A data source name that can be used by any process on the computer) |