providing a self {HEAD ~ contained apparatus} comprising a processor, a display, and {TAIL ~ an array} of inertial sensors, all operably connected 
providing a self { HEAD ~ contained apparatus } comprising a processor , a display , and { TAIL ~ an array } of inertial sensors , all operably connected
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH