The projectors and {TAIL ~ the cameras} may be electronically connected to {HEAD ~ a computer processor} which controls their operation 
The projectors and { TAIL ~ the cameras } may be electronically connected to { HEAD ~ a computer processor } which controls their operation
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH