The exhibition of Imaging by Numbers, curated by the Block Museum of Art at Northwestern University, explores the development of computer programming as a medium for artistic expression in creating prints, drawings, photographs, and artists' books. Featuring works from 1952 to the present by 39 North American and European artists, including Ben F. Laposky and C. E. B. Reas, these stunning pieces were created through algorithmic processes that "instruct" the computer how to draw an image. The final compositions, reproduced here in vivid color illustrations, are dazzling and unpredictable, and introduce art lovers to a new age of electronic art.