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Postal Union: A Group of political units associated
to a greater or lesser degree for the purpose of communication among citizens,
businesses, and governmental units.
Nearly all star systems
are members of one postal union or another. Governments cooperate along
their borders in order to allow the efficient flow of communications between
them Members of a postal union forward mail through their territories (subject,
of course, to local security needs, acts of war,
and so on) to the proper addresses. On the average, communication is at
the speed of the fastest available transportation, which means about three
or four parsecs per week. -ld IE