Railroads History 72 Finance 44 Employees 33 Transportation 23 Freight 21 Rates 17 more ... Railroads and state 15 Labor unions 12 Canals 10 Mergers 9 Periodicals 9 Salaries, pensions, etc 9 Management 8 African Americans 7 Locomotives 7 Design and construction 6 Employment 6 Commerce 5 Description and travel 5 Sources 5 Businessmen 4 Location 4 Rolling stock 4 Steamboat lines 4 Strikes and lockouts 4 Surveying 4 Cars 3 Coal 3 Corporate reorganizations 3 Directories 3 Discrimination in employment 3 Early works to 1850 3 Economic conditions 3 Exhibitions 3 Histoire 3 Railroad companies 3 Social aspects 3 Accidents 2 Accounts, bookkeeping, etc 2 less ...