The specific arrangement to be described employs {HEAD ~ a conventional IBM PC compatible computer} utilizing the IBM PC DOS or {TAIL ~ Microsoft MS DOS operating system}, or the equivalent 
utilizing
The specific arrangement to be described employs { HEAD ~ a conventional IBM PC compatible computer } utilizing the IBM PC DOS or { TAIL ~ Microsoft MS DOS operating system } , or the equivalent
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH