Similarly, the term device driver is intended to refer to not only the specific PC/MS DOS device drivers to be discussed in more detail below, but also to {HEAD ~ their functional equivalents} implemented in {TAIL ~ other operating systems} 
implemented in
Similarly , the term device driver is intended to refer to not only the specific PC / MS DOS device drivers to be discussed in more detail below , but also to { HEAD ~ their functional equivalents } implemented in { TAIL ~ other operating systems }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL