A dedicated socket in the computer for a mouse. On the first desktop PCs, the mouse connected via the serial port, which was superseded by the PS/2 port. Today, mice plug into any USB port, although motherboards with PS/2 sockets are still made (see PS/2 port
). The Apple Desktop Bus (ADB) was used for keyboards and mice on the first Macs but was later replaced with USB (see Apple Desktop Bus
). See PC input/output
Early Mouse Ports
Still found on many PCs, these mouse ports were widely used. Today, like most peripheral devices, the mouse typically connects via USB.