Isotype (International System of Typographic Picture Education) is a system of pictograms designed to communicate complex information in a nonverbal way. Developed in 1936 by a team of sociologists lead by Otto and Marie Neurath, this process of "transforming" data into visual form has strongly influenced the fields of graphic design.The Transformer: Principles of Making Isotype Charts is the first English-language primer on Isotypethe foundation of the modern-day pictographic signals found in airports, train stations, highway signs, and computer interfaces. Featuring illustrated examples and essays, including a previously unpublished essay by Marie Neurath,The Transformer is a long-overdue appreciation of an important moment in the history of visual communication.