Machine manager 610 also keeps track of the specific versions of {HEAD ~ software} that is being used on {TAIL ~ each} of the machines as well as the Virtual Machine Images that are installed on each of the machines 
Machine manager 610 also keeps track of the specific versions of { HEAD ~ software } that is being used on { TAIL ~ each } of the machines as well as the Virtual Machine Images that are installed on each of the machines
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH