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Subclass HE
HE1-9990 | Transportation and communications | |||
HE199-199.5 | Freight (General) | |||
HE199.9 | Passenger traffic (General) | |||
HE305-311 | Urban transportation | |||
HE323-328 | Transportation geography. Trade routes | |||
HE331-380 | Traffic engineering. Roads and highways. Streets | |||
HE369-373 | Traffic surveys (General) | |||
HE374-377 | Bridges | |||
HE379-380 | Tunnels. Vehicular tunnels | |||
HE380.8-971 | Water transportation | |||
HE380.8-560 | Waterways | |||
HE561-971 | Shipping | |||
HE730-943 | Merchant marine. Ocean shipping. Coastwise shipping | |||
HE1001-5600 | Railroads. Rapid transit systems | |||
HE5601-5725 | Automotive transportation Including trucking, bus lines, and taxicab service | |||
HE5746-5749 | Stage lines | |||
HE5751-5870 | Ferries | |||
HE5880-5990 | Express service | |||
HE6000-7500 | Postal service. Stamps. Philately | |||
HE7511-7549 | Pneumatic service | |||
HE7601-8700.9 | Telecommunication industry. Telegraph | |||
HE8660-8688 | Wireless telegraph. Radiotelegraphy | |||
HE8689-8700.95 | Radio and television broadcasting | |||
HE8701-9680.7 | Telephone industry | |||
HE9713-9715 | Cellular telephone services industry. Wireless telephone industry | |||
HE9719-9721 | Artificial satellite telecommunications | |||
HE9723-9737 | Signaling | |||
HE9751-9756 | Messenger service | |||
HE9761-9900 | Air transportation. Airlines |