The John E. Brennan Outdoor Advertising Survey Reports document the professional endeavors of outdoor advertising design researcher John E. (Jack) Brennan for the time period 1947 to 1980. His work primarily consisted of conducting market surveys on the effectiveness of billboard advertisement design and layout, and reporting his findings to subscribers to advance design efficiency for the industry. About 786 surveys cover 15,720 different advertisement designs posted on signs in major markets around the US. Forty-two different cities were covered in 27 states. His survey interviewers questioned participants on how well they remembered advertisements and product brand names. Brennan then analyzed the survey data to produce practical information for advertisers and advertising companies on improving advertisement copy, thereby increasing advertising efficiency and profits. His emphasis was on outdoor advertisement design and copy, not traffic or other outdoor industry factors. The collection is comprised mainly of paper files, most containing color photographs attached to the paper data reports or sleeved along side them. Other significant items include the Copy Clues reports which capitalize on the data Brennan compiled, suggesting outdoor advertisement (also known as poster) design improvements. Other supporting materials within the collection include survey methodology information, related writings, summary data files, and business correspondence. Even without the context of Brennan's survey forms and data, the collection is a sizable photo library of mid-20th century commercial art created for outdoor advertising. Additional description of the individual series presented below may be found within the container list.