Adders, namely, calculators, electronic accumulators; acoustic couplers; alarms for use with balance prostheses that utilizes pressure sensitive pads to monitor patient or resident movement; antennae for use with receiver as part of positional balance prosthesis; electric apparatus for recording data from a positional balance prosthesis; apparatus for recording of distances, as part of the positional balance prosthesis; electric batteries; optical glasses; optical frames; spectacle lenses; CD...