An image forming apparatus capable of communicating with {HEAD ~ a plurality} of {TAIL ~ host computers}, comprising: 
of
An image forming apparatus capable of communicating with { HEAD ~ a plurality } of { TAIL ~ host computers } , comprising :
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH