A2B is an abbreviation for "Automotive Audio Bus". As the name suggests, it is a new technology developed with the aim of reducing the weight (fuel efficiency) and cost of audio harnesses used in in - vehicle infotainment systems, which are becoming increasingly popular. In addition to Ford Motor Co. of the United States, several other manufacturers in Japan, the United States, and Europe are planning to this bus in mass - produced vehicles, and it is expected to become a standard communication bus for the car audio industry in the near future.