Joseph W. Lynch was a textile chemist at the DuPont Company from 1954 to 1994. Lynch's papers document his forty-year career at DuPont. Some company records in Lynch's possession antedate his employment, while others describe his job searches from 1952 to 1954. The bulk of the records deal with customer relations, including identifying and resolving problems concerning DuPont's textile fiber products and providing technical assistance to customers.

MCI Communications Corporation (MCI) was a large telecommunications company. It was organized in October 1963 in Joliet, Illinois, by John D. (Jack) Goeken (1930-2010) as Microwave Communications, Inc. Goeken and his partners were planning to provide point-to-point private line microwave communications between Chicago and St. Louis to small businesses. This small collection of MCI documents primarily concerns customer service support, branch service, billing/system problems, and internet services.