In {TAIL ~ the present specification}, {HEAD ~ the term operating system} will be employed to refer generally to operating systems of this class 
In
In { TAIL ~ the present specification } , { HEAD ~ the term operating system } will be employed to refer generally to operating systems of this class
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH