Many types of useful devices may then be attached to the platform including {HEAD ~ devices} that require external power or {TAIL ~ devices} that possess their own power and are operated via wireless signals 
Many types of useful devices may then be attached to the platform including { HEAD ~ devices } that require external power or { TAIL ~ devices } that possess their own power and are operated via wireless signals
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH