| Subject | English | Spanish |
| 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) |