- Cabs, horse-drawn: for hire
- Car loading
- Carriages, horse-drawn: for hire
- Cleaning railroad ballasts
- Dining car operations, not performed by line-haul railroad companies
- Freight car loading and unloading, not trucking
- Parlor car operations, not performed by line-haul railroad companies
- Pipeline terminal facilities independently operated
- Railroad car repair, on a contract or fee basis
- Sleeping car and other passenger car operations, not performed by railroads
- Space flight operations, except government
- Stockyards, not primarily for fattening or selling livestock
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