These posters were developed to meet the need for an informative, widely accessible, and inexpensive display to mark the centennial of the invention of the X ray. Designed for display in lobbies and exhibit areas in hospitals, medical centers, medical and technical schools, radiology practices, and public libraries, the posters offer professional and lay audiences a lively interpretation of radiology’s medical history. The designers organized archival material and an interpretive script provided by the client into a graphic hierarchy of zones, layers, and timelines that could be scanned, read casually, or studied in depth.