| Description | Category | Last Updated | |
 | Communications (80) | ||
| Electric, Gas and Sanitary Services (48) | ||
| Transportation by Air (9) | ||
| Transportation Services (8) | ||
| Water Transportation (7) | ||
| Motor Freight Transportation and Warehousing (5) | ||
| Local and Surbaban Transit and Interurban Highway Passenger Transportation (3) | ||
| Pipelines, Except Natural Gas (2) | ||
| Railroad Transportation (1) |