Obd cables mainly include: obdi to obdii cable, scan tool’s main unit cable, testing cable, RS232 to RS458 cable, RS232 to lan cable, lan cable, USB cable and more.
OBD adapter mainly include: socket adapter, one car make adapter for some specific scan tool or programmer, and so on.
OBD interface mainly include: diagnostic interface and the interface connect car and mobile devices.
BMW INPA Ediabas full English version installation tutorial here. Enjoy yourself!