In this collection, the second in the series, Knuth explores the relationship between computers and typography. The present volume, in the words of the author, is a legacy to all the work he has done on typography. When he thought he would take a few years' leave from his main work on the art of computer programming, as is well known, the short typographic detour lasted more than a decade. When type designers, punch cutters, typographers, book historians, and scholars visited the University during this period, it gave to Stanford what some consider to be its golden age of digital typography. By the author's own admission, the present work is one of the most difficult books that he has prepared. This is truly a work that only Knuth himself could have produced.