Edwin Black Nature published a correction (Nature 415, 370; 2002) citing two errors in a review by Professor Howard Segal of the book IBM and The Holocaust: The Strategic Alliance Between Nazi Germany and America's Most Powerful Corporation by Edwin Black (Nature 411, 993–994; 2001). In addition, Professor Segal, in his review, asserted that the book's author exaggerated the importance of punch-card machines. Nature has been made aware that the reviewer has retracted this assertion, stating: “In fact, I know of no evidence or documentation that the book included any exaggeration at all.”