In a distributed system, such as a local area network having a facility for synchronous remote procedure calls and multi threading, {HEAD ~ an interface mechanism} for linking {TAIL ~ client workstations} on the distributed system with external switched communications networks is provided 
for linking
In a distributed system , such as a local area network having a facility for synchronous remote procedure calls and multi threading , { HEAD ~ an interface mechanism } for linking { TAIL ~ client workstations } on the distributed system with external switched communications networks is provided
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