Design is fundamental to our lives, for it is really about the making of things, which is the business of artists, scientists and technologists alike. All are concerned with innovation and problem-solving and can profit from a study of ideas developed in other disciplines. A minor classic since its first publication in the United States in 1989, this book examines some of the key principles of design and shows how these also underlie much of what we know of art, mathematics and science. It covers such topics as number, ratio and scale, rhythm and harmony, similarity and contrast, and suggests how these may relate to design problems.