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