This industry group comprises establishments primarily engaged in manufacturing motor vehicles. Establishments that manufacture chassis and then assemble complete motor vehicles (including truck cab and chassis assemblies) and those that only manufacture motor vehicle chassis are both classified in this industry group.

This industry group comprises establishments primarily engaged in manufacturing motor vehicle bodies and cabs, truck trailers and non-commercial trailers. The bodies and cabs may be sold as such, or assembled on purchased chassis.

This industry group comprises establishments primarily engaged in manufacturing motor vehicle parts, including engines. Establishments that rebuild motor vehicle parts are included in this industry group, in the same industry as the manufacture of new parts.

This industry group comprises establishments primarily engaged in manufacturing aircraft, missiles, space vehicles and their engines, propulsion units, auxiliary equipment, and parts thereof. The development and production of prototypes is classified in this industry, as is the factory overhaul and conversion of aircraft and propulsion systems.

This industry group comprises establishments primarily engaged in manufacturing and rebuilding locomotives and railroad cars, of any type or gauge, including frames and parts. The manufacture of rapid transit cars and special-purpose self-propelled railroad equipment, such as rail layers, ballast distributors, rail-tamping equipment and other railway track maintenance equipment is included in this industry group.

This industry group comprises establishments primarily engaged in operating a shipyard or manufacturing boats. Shipyards are fixed facilities with dry docks and fabrication equipment capable of building a ship, defined as water-craft suitable or intended for other than personal or recreational use. Boats are defined as water-craft suitable or intended for personal or recreational use. The activities of shipyards include the construction of ships, their repair, conversion and alteration, the production of prefabricated ship sections and barge sections, and specialized services, such as ship scaling, when performed at the shipyard.

This industry group comprises establishments, not classified to any other industry group, primarily engaged in manufacturing transportation equipment and parts.