{TAIL ~ The user}, vendor, manufacturer and {HEAD ~ other supplier} may maintain databases housed on the central computers 
{ TAIL ~ The user } , vendor , manufacturer and { HEAD ~ other supplier } may maintain databases housed on the central computers
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH