Law and legislation 6,542 Bridges 5,977 Commerce 4,010 History 1,828 Railroads 1,717 Appropriations and expenditures 1,488 Interstate commerce 1,414 Ships 1,361 Officials and employees 1,217 Harbors 1,181 Budget 1,045 Transportation 977 Lighthouses 940 Finance 933 Government policy 873 Claims 805 Electronic commerce 734 Navigation 711 International trade 699 Research 674 Economic conditions 657 Selection and appointment 637 Governmental investigations 582 Safety measures 580 Bills, Private 564 Rates 550 Expenditures, Public 545 Consumer protection 531 Prevention 523 Dredging 500