The Cambridge Room at the Cambridge Public Library has a vast storehouse of material related to the history of this most historic American city. Recently, they have allowed the staff at the Internet Archive access to a variety of materials, resulting in a number of primary documents that now reside on this site. Here, users can access the annual Cambridge business directories which profile local...

During the 19th and early 20th century, the railroad was the reigning king of American industry. A range of short and long haul railroads built and used over 240,000 miles of track from north to south and east to west. This fascinating online exhibit from Harvard Business School's Baker Library looks at how these companies transformed American business, and makes some comparisons with European...