1992 CENSUS OF TRANSPORTATION, COMMUNICATIONS, AND UTILITIES
GEOGRAPHIC AREA SERIES

Abbreviations and Symbols

      The following abbreviations and symbols are used in this CD-ROM:

      D           Withheld to avoid disclosing data for individual companies;
                  data are included in broader kind-of-business totals.
      N           Not available.
      X           Not applicable.
      n.e.c.      Not elsewhere classified.
      pt.         Part.
      R           Revised.
      *           See Introduction or Coverage and Methodology (in DOCVIEW)
                  for explanation of coverage for Railroad Transportation (SIC
                  40) and for Air Transportation (SIC 45).


      The following symbols are used in this publication to show employment
size ranges for employment data that have been withheld to avoid disclosing
data for individual companies:

      Symbol      Employment size

      a           0-19
      b           20-99
      c           100-249
      e           250-499
      f           500-999
      g           1,000-2,499
      h           2,500-4,999
      i           5,000-9,999
      j           10,000-24,999
      k           25,000-49,999
      l           50,000-99,999
      m           100,000 or more