Ports on an RFID reader that can be connected to external devices. An input port might be connected to a photoelectric eye to turn on the reader when an object enters the reader field. An output ...

requires a control circuit that interfaces with the computer's processor (CPU ... internal drives (storage drive and CD/DVD drive) and ports for external devices: keyboard, mouse, monitor ...

There’s also a 5Gbps USB-C connection for data, plus a second USB-C port for power input at up to 85W rated. (The charger allows up to 100W in, but supplies 85W.) There’s both an SD card slot ...