| Subject | English | Portuguese |
| comp., MS | system device | dispositivo de sistema (A device on a system board, such as an interrupt controller, keyboard controller, real-time clock, DMA page register, DMA controller, memory controller, FDC, IDE port, serial and parallel port, PCI bridge, and so on. In today's PCs, these devices are typically integrated in the supporting chip set) |
| lab.law. | system permitting connection to an external device | sistema de ligação que permite a ligação a um dispositivo externo |
| mech.eng., el. | system-sensitive device | dispositivo de palpação |