Ja. Vanwoerden et al., M3S - A STANDARD COMMUNICATION ARCHITECTURE FOR REHABILITATION APPLICATIONS, Computing & control engineering journal, 5(5), 1994, pp. 213-218
The M3S bus is a proposed standard digital communication bus designed
to improve access to technical aids by disabled people. It provides a
standard interface between input devices and end-effectors, allowing d
evices from different manufacturers to be linked in the same system. T
he bus is primarily intended for use on wheelchairs. It is based on an
industry-standard protocol, CAN, and includes additional signal lines
to increase safety and integrity.