The Leeds & Northrup Company traces its origins to Morris E. Leeds & Company, established by Morris E. Leeds (1869-1952) in 1899 to develop and manufacture precision instruments. Their records consists of minutes from the Development and Executive Committes and the Cooperative Association.

Ralph Mosser Barnes (1900-1984) was an American industrial engineer who was a pioneer in motion and time study applications. This collection consists of four films showing a selection of studies that were managed or designed by Barnes.

A machine shop is a place where skilled workers use machine tools to make parts. The parts are usually made of metal or plastic, although other materials can be used. This photograph shows the interior of an unidentified machine shop with a group of workers.