| Subject | English | Japanese |
| comp., MS | external source system | 外部ソース システム (A data repository, such as a data warehouse, data mart, or OLTP system, that is outside a specific deployment) |
| construct. | optimal control system of heat source | 熱源最適制御システム (ねつげん・さいてき・せいぎょしすてむ) |
| comp. | n source code control system | ソースコード管理システム |
| comp., MS | source system | ソース システム (The system in which application and metadata reside before they are migrated to a different one) |
| comp., MS | System Data Source Name | システム データ ソース名 (A data source name that can be used by any process on the computer) |
| tech. | water source heat pump system | 水熱源方式 (みずねつげんヒート•ポンプほうしき) |