Widely used in the analog audio/video world as well as for electrical connections (see NuBus
), 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 The 5-pin was superseded by a smaller 6-pin Mini-DIN, which also replaced the serial port for the mouse.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
Superseded by USB, plugs and sockets like these are only found on older equipment.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.