{HEAD ~ The computer program} may also include a code segment for communicating with {TAIL ~ a mobile switching station} and remote service providers 
{ HEAD ~ The computer program } may also include a code segment for communicating with { TAIL ~ a mobile switching station } and remote service providers
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH