In various embodiments, {HEAD ~ user system} 100 comprises a virtual system or {TAIL ~ virtual systems} executing on one or more hardware platforms 
comprises
In various embodiments , { HEAD ~ user system } 100 comprises a virtual system or { TAIL ~ virtual systems } executing on one or more hardware platforms
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH