sentences:  This book, which represents a snapshot of the disciplines as of 1985, has been for many years the standard textbook in the field, and has been translated into four foreign Languages (Russian, Japanese, Chinese, and Polish).He has made several contributions to the computational geometry, the most recent being the notion of "algorithmic degree" as a key feature to control robust implementations of geometric algorithms.In addition, Preparata has worked in many other areas of, or closely related to, computer science.