PS/2 interface, serial interface, parallel interface, RJ-45 network interface, USB2.0 interface and audio interface. The high-end motherboard includes IEEE 1394 interface and wireless module. PS/2 interface is used to connect PS/2 mouse and PS/2 keyboard, green interface is connected to mouse, and blue interface is connected to keyboard; The serial interface is used to connect an external modem and a recording pen. Parallel LPT interface is used to access old stylus and inkjet printers.