The presence of {HEAD ~ the message} is polled using the first application and, if the message is present, the message is transmitted from the internal storage to the first application for {TAIL ~ processing} 
The presence of { HEAD ~ the message } is polled using the first application and , if the message is present , the message is transmitted from the internal storage to the first application for { TAIL ~ processing }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL