 After shuttering the magazine operations in the 1950s, the Crowell-Collier Publishing Company merged with the American Macmillan Company in 1960 and became a large educational company with subsidiaries for books, textbooks, correspondence schools and other educational tools and materials.The company officially changed its name to Macmillan, Inc. in 1973.The Crowell-Collier Publishing Company had its roots in the agricultural trade of the 19th century.