Archived - Standard Industrial Classification - Companies and Enterprises (SIC-C) 1980
- J - Transportation Services
- 45 - Air Transport_3SIC-C1980
- 451 - Air Transport_1SIC-C1980
- 4511 - Air Transport_2SIC-C1980
- 46 - Railway Transport
- 461 - Railway Transport_1SIC-C1980
- 4611 - Railway Transport_2SIC-C1980
- 47 - Water Transport_3SIC-C1980
- 471 - Water Transport_1SIC-C1980
- 4711 - Water Transport Carriers_2SIC-C1980
- 4712 - Services Incidental to Water Transport
- 48 - Truck Transport (Except Petroleum)
- 481 - Truck Transport (Except Petroleum)_2SIC-C1980
- 4811 - Truck Transport (Except Petroleum)_1SIC-C1980
- 49 - Urban Transit and Other Passenger Transport
- 491 - Urban Transit System Operations
- 4911 - Urban Transit System Operations_1SIC-C1980
- 492 - Other Passenger Transport
- 4921 - Interurban and Rural Transit System Operations
- 4922 - Taxi Service
- 4929 - Other Passenger Transport n.e.c.
- 50 - Storage and Other Services Incidental to Transport
- 501 - Storage and Other Services Incidental to Transport_1SIC-C1980
- 5011 - Storage and Warehousing
- 5019 - Other Services Incidental to Transport n.e.c.
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