The Consolidated Rail Corporation (Conrail) was incorporated in October 1974. It was formed under the auspices of the United States Railway Association, a quasi-public agency established for the purpose of solving the problems of bankrupt railroads in the Northeast and Midwest. The Conrail photograph collection consists of a large number of images from its company files, but the majority of the material comes from its predecessor companies: Pennsylvania Railroad and Penn Central Transportation Company. These items are predominanatly composed of photographs, negatives, transparencies, lantern slides, and films.

The Pennsylvania Railroad Company was the largest railroad in the United States in terms of corporate assets and traffic from the last quarter of the nineteenth century until the decline of the northeast's and midwest's dominance of manufacturing. These records provide nearly comprehensive coverage of corporate matters for the entire time span and reasonably complete coverage of the functional departments from 1920 to 1950, with less coverage from 1893 to 1920 and from 1950 to 1968.

The Pennsylvania Railroad (PRR) was chartered in 1846 to completing an all-rail road across the state. Between 1855 and 1874, the PRR underwent rapid expansion and emerged as one of the two largest railroad systems in the area east of the Mississippi and north of the Ohio. This collection consists of two interviews conducted in 1998 in West Chester, Pennsylvania with five women who worked for the Pennsylvania Railroad.

Chartered in 1871, Reading Company was the holding company for the system of railroads, canals and coal mines assembled by the predecessor Philadelphia & Reading Railroad Company between 1833 and 1896. The collection consists of the corporate records of the Reading Company (1871-1976), the Philadelphia & Reading Railroad Company (1833-1896), the Philadelphia & Reading Railway Company (1896-1923), and 159 predecessors and subsidiaries.

William Hollis (1868-1908) was a telegrapher working a block station of the Pennsylvania Railroad at Marietta, Pennsylvania. The pocket diary primarily documents his record of work in 1891, including assignments, discipline for mistakes, travel to headquarters, and records of many accidents - but also includes occasional references to entertainment he attended.

The collection consists of four World War II posters related to women in the workforce. Women on the Home Front worked in war industries and volunteered for war-related organizations, excelling at historically male-dominated trades such as welding, riveting, and engine repair. Their contribution was essential for the production and supply of wartime goods.