| Subject | English | Portuguese |
| industr., polit. | European Source Term Code System | Sistema Europeu de Código do Termo da Fonte |
| comp., MS | external source system | sistema de origem externa (A data repository, such as a data warehouse, data mart, or OLTP system, that is outside a specific deployment) |
| comp., MS | source system | sistema de origem (The system in which application and metadata reside before they are migrated to a different one) |
| commun. | source-coding system | sistema de codificação da fonte |
| comp., MS | System Data Source Name | DSN de sistema (A data source name that can be used by any process on the computer) |