Widely used in the analog audio/video world as well as for electrical connections (see
NuBus and
VMEbus), DIN connectors were the plugs and sockets for mice and keyboards on earlier PCs. The first PC keyboards used a 5-pin DIN "AT" connector. The 5-pin was superseded by a smaller 6-pin Mini-DIN, which also replaced the serial port for the mouse. Eventually, all DIN-based mice and keyboards were replaced by USB. See
DIN,
DIN radio and
PC keyboard.
DIN Connectors
Superseded by USB, plugs and sockets like these are only found on older equipment. DIN-to-USB adapters enable old peripherals to work on new computers and vice versa.