Keyboard Cable - Mouse Cable 101

PS/2 Keyboard (or Mouse, Personal System 2), standard developed by IBM. Connector type: miniature DIN 6 pins (MDIN6) that replaced older 9 and 25-pin serial ports used for keyboard and mouse connections.
AT Keyboard (or Mouse), format used by IBM before PS/2 was developed. Keyboard and Mouse connector consist DIN style 5 pins (DIN5) for keyboard or DB9 serial port for mouse