_{Institute for the History of Technology and Industrial Archaeology}   

_{National New Deal Preservation Association}    

_{Society for Industrial Archeology} 

_{American Association for State and Local History}

_{Society for the History of Technology}  

_{The International Committee for the Conservation of the Industrial Heritage}  

_{Historic American Engineering Record} 

_{American Association of Museums}  

Association for the Preservation of Technology 

_{National Trust for Historic Preservation}  

   _{Public Historian} 

_{Early American Industries Association}

 Center for the History of Business Technology and Society  

Miscellaneous:

Historical Construction Equipment Association      

Railroads:

Great American Station Foundation .

Amtrak Historical Society

Railway and Locomotive Historic Society

Lake Superior Railroad Museum

Surviving Steam Locomotives

Canals:

American Canal Society .

Bridges:

Historic Bridges .

Non Profit Web Resources 

 Travel Industry Association of America .

The Foundation Center

Council for Urban Economic Development

Catellus

Map History  

Edison Electric Institute    

US Patent Office     

Ask A Historian  

Government Printing Office

Department of Transportation

  Sanborn Insurance Maps