TRANSPORTATION EQUIPMENT AND SUPPLIES, EXCEPT MOTOR VEHICLES (SIC F5088) Establishments primarily engaged in the wholesale distribution of transportation equipment and supplies. Establishments primarily engaged in the wholesale distribution of motor vehicles and motor vehicle parts are classified in Industry Group 501, and those distributing pleasure boats are classified in Industry 5091. SIC 5088 is subdivided in some tables into the following catagories- 1. Aircraft and aeronautical equipment and supplies. 2. Marine machinery, equipment, and supplies. 3. Other transportation equipment and supplies - Establishments primarily engaged in selling equipment and supplies used in the operation, maintenance, and repair of railroads, streetcars, buses, tramways, aerial hoists, and horse-drawn vehicles. AIRCRAFT AND AERONAUTICAL EQUIPMENT AND SUPPLIES Establishments primarily engaged in the wholesale distribution of aircraft and aeronautical equipment, frames, parts, supplies, and accessories. MARINE MACHINERY, EQUIPMENT, AND SUPPLIES Establishments primarily engaged in the wholesale distribution of ships, boats, and marine propulsion machinery, equipment, and parts. Establishments primarily engaged in the wholesale distribution of marine pleasure craft are classified in Industry 5091. OTHER TRANSPORTATION EQUIPMENT AND SUPPLIES Establishments primarily engaged in selling equipment and supplies used in the operation, maintenance, and repair of railroads, streetcars, buses, tramways, subways, aerial hoists, and horse-drawn vehicles.