(D-SUBminiature connectors) A family of plugs and sockets widely used in communications and on earlier PCs. For example, the analog VGA monitor interface uses a D-sub 15-pin plug and socket.

For the young'uns reading who are still none the wiser, these 29-pin and 15-pin connectors were at risk of having their pins bent or coming loose if they relied on just staying plugged in ...

An early I/O connector that is used to attach a joystick or other video game controller. The legacy game port on a PC is a 15-pin socket; however, this dedicated connector was replaced with USB.