Christopher Burke is a design historian and Associate Professor in the Department of Typography and Graphic Communication at the University of Reading, UK. He is Research Fellow on the project ‘Isotype: Origin, Development, and Legacy’, based at the University of Vienna, Austria, and he co-curated the exhibition ‘Isotype: International Picture Language’ at the Victoria and Albert Museum, UK. He co-edited Otto Neurath’s autobiography, From Hieroglyphics to Isotype (2010), and the collection Isotype: Design and Contexts 1925 1971 (2013). Günther Sandner is a political scientist and historian. He is FWF Research Fellow at the Institute Vienna Circle, University of Vienna, Austria, where he leads the project ‘Isotype: Origin, Development, and Legacy’. He has written numerous essays on the topics of Isotype and logical empiricism and is the author of Otto Neurath, a biography, published in 2014.