The method includes executing an application program from {HEAD ~ a plurality} of application programs on {TAIL ~ an operating system} of a personal computer 
The method includes executing an application program from { HEAD ~ a plurality } of application programs on { TAIL ~ an operating system } of a personal computer
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH