Book excerpt: Manual of Symbols and Terminology for Physicochemical Quantities and Units, 1979 Edition contains physical quantity tabulations of products. The Commission on Symbols, Terminology, and Units is a part of the Division of Physical Chemistry of the International Union of Pure and Applied Chemistry. Its general responsibilities are to secure clarity and precision, and wider agreement in the use of symbols, by chemists in different countries, among physicists, chemists, and engineers, and by editors of scientific journals. This book is composed of 13 chapters, and begins with the determination of physical quantities and symbols for physical quantities, which are generally organized in a dimensional system built upon seven base quantities. The succeeding chapters deal with recommended names and symbols for quantities in chemistry and physics. These topics are followed by discussions on units and symbols for units, numbers that printed in upright type. Other chapters describe physical quantities, units, and numerical values, recommended mathematical symbols, symbols for chemical elements,nuclides, and particles. The final chapters consider the values of some fundamental constants. This book will be of value to analytical and physical chemists.