a book by L. Ron Hubbard, published in 1951, which covers the different aspects of the Tone Scale and how this technologycan be used in processing and in life. The work is divided into two major sections: Book One and Book Two. Book One is a detailed analysis of each of the columns of the first part of the Hubbard Chart of Human Evaluation (a chart organized with various columns and gives behavior characteristics, plottedout mathematically on the basis of ARC). See also ARC and Tone Scale in this glossary.—PDC Volume 7 Approved Glossary