| Subject | English | Spanish |
| comp., MS | autonomous system boundary router | enrutador de límite de sistema autónomo (A router that exchanges routing information with routers that belong to other autonomous systems. The ASBR then advertises external routes throughout the autonomous system. ASBRs can be internal or area border routers, and they might or might not be connected to the backbone) |
| comp., MS | system boundary | límite de sistema (In a use case diagram, a boundary surrounding the use cases that indicates the system. You can resize the system boundary by dragging a selection handle on the System Boundary shape) |
| environ., tech. | system boundary | límite del sistema |