Transportation, Communications, and Utilities Except Railroad Transportation and U.S. Postal Service Totals for all establishments in Division E of the 1987 Standard Industrial Classification (SIC) Manual: Transportation, Communications, Electric, Gas, and Sanitary Services, except Railroad Transportation and the U.S. Postal Service. (SIC Major Groups 41, 42, 44, 45, 46, 47, 48, and 49, except Major Groups 40 and 43.)