| Environment/Superfund | Environment/Superfund | 55 |
| Taxation/Internal Revenue Code | Taxation/Internal Revenue Code | 48 |
| Defense | Defense | 28 |
| Railroads | Railroads | 12 |
| Clean Air and Water (quality) | Clean Air and Water (quality) | 7 |
| Tariff (miscellaneous tariff bills) | Tariff (miscellaneous tariff bills) | 6 |
| Housing | Housing | 6 |
| Telecommunications | Telecommunications | 5 |
| Natural Resources | Natural Resources | 5 |
| Real Estate/Land Use/Conservation | Real Estate/Land Use/Conservation | 1 |
| Energy/Nuclear | Energy/Nuclear | 1 |
| Computer Industry | Computer Industry | 1 |
| Media (information/publishing) | Media (information/publishing) | 1 |
| Waste (hazardous/solid/interstate/nuclear) | Waste (hazardous/solid/interstate/nuclear) | 1 |