Frank A. Weer (1932-2019) was a white-collar railroad employee who spent most of his career with the Reading Company, and after the transfer of railroad operations in 1976, with Consolidated Rail Corporation (Conrail). This collection is a small portion of a much larger collection of official railroad company documents, maps and drawings. Documents are primarily those of the Reading Company, Pennsylvania Railroad Company, Penn Central Transportation Company and Consolidated Rail Corporation (Conrail).

Karl Gabosch (1932-2008) was an employee of Pennsylvania Railroad Company and its successors, Penn Central and Conrail. The collection consists of a sample of company manuals, internal publications, and maps that were issued to him over the course of his career.

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 Company was the largest railroad in the United States in terms of corporate assets and tratffic from the last quarter of the nineteenth century until the decline of the northeast's and midwest's dominance of manufacturing. This small collection consists of six schematic diagrams of racks and signals placed in service or removed from service, mostly in connection with the step-by-step construction of the Philadelphia Improvements of 1927 to 1952.