John A. Bader II (1895-1961) was a Wilmington, Delaware, building contractor active during the 1930s, 1940s, and 1950s. The records are primarily Bader's business papers. The collection includes engineer's field books, diaries of trips, and job notes. Eight volumes contain profit and loss statements, cost accounting for jobs, records of checks paid, and files on individual construction jobs.

Ken White Associates, Inc., formed by industrial designer Ken White in 1947, was a design firm that developed plans and designs for thousands of independent and academic bookstores throughout the United States, as well as many other types of retail businesses. The company also played a leading role in introducing convenience stores and innovative food service options on college campuses. The records of the company include organizational files documenting the corporate organization; financial papers; project files; publications by White and his son, as well as the records of the partnerships and other companies White formed as he expanded his business and services. The collection also contains files on White's professional activities, including papers related to conferences, conventions, and trade shows, memberships in various organizations, and seminars and talks.