| Subject | English | Korean |
| comp., MS | external delivery system | 외부 배달 시스템 (A system, such as Microsoft Exchange Server, that delivers formatted notifications to destination devices) |
| comp., MS | external source system | 외부 원본 시스템 (A data repository, such as a data warehouse, data mart, or OLTP system, that is outside a specific deployment) |
| comp., MS | External System | 외부 시스템 (A supported source of data that can be modeled by Business Connectivity Services, such as a database, Web service, or custom .NET Framework assembly) |