There has been significant expansion and development in clinical laboratories sciences since the previous edition of this book was published in 1995. Some new disciplines have appeared and the interrelationships between different disciplines within clinical laboratory sciences demand a common structure and language for data exchange in the laboratory and with the clinicians. It is of prime importance to standardise laboratory reports for reliable exchange of patient examination data without loss of meaning or accuracy. For that, it is important to promote the unified format developed by IUPAC and IFCC. This book groups and updates the recommendations and will be appropriate for laboratory scientists, medical professionals and students in this area.