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