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