Esslinger, Hartmut, 1944- Keep it simple : the early design years of Apple / Hartmut Esslinger, Founder of Frog Design. - Stuttgart : Arnoldsche Art Publishers, c2013. - x, 283 p. : ill. (chiefly col.). Includes bibliographical references ISBN: 9783897904071 Subjects--Personal Names: Jobs, Steve, 1955-2011. Esslinger, Hartmut, 1944- Subjects--Corporate Names: Apple Computer, Inc.--History. Subjects--Topical Terms: Computer engineering--History. LC Class. No.: TK7885.A5 / E874K 2013