In these alphabetically arranged volumes, Warren, along with 227 contributors, strives to "provide a useful resource on the entire scope of photography in the twentieth century." The set has an international reach, and 324 of its 525 entries cover people, mostly photographers. The remaining articles, as outlined in the thematic list of entries, cover "Equipment" (Camera: Digital; Enlarger); "Institutions, Galleries, and Collections" (Museum of Modern Art); "Publications and Publishers" ( National Geographic); "Regions" ( Mexico, photography in); and "Topics and Terms" ( Contact printing, Industrial photography, Photographic "truth"). Some articles, such as Camera: An overview, offer surveys on broad topics. Other, such as C able release, zero in on specifics.