TRANSPORTATION (TN)
A primary category containing information pertaining to
passenger and freight transportation by rail, highway or water. Including services such as stevedoring,
backing, loading and unloading, pipe line transportation, warehousing (in transit).
Subject
categories and sub-categories fully available for research are bolded. Closed categories and
sub-categories have a simple phrase describing their contents.
DESCRIPTION
OF SECONDARY FILE CODES
File Code Description
TN Transportation
TN001-01 Motor Pool
TN002 Interurban
Transportation
TN002-01 Metropolitan D.C.
Subway System
TN003 Pipeline
TN004 Railroad
TN005 Water