This is a reference book with the full list of all the 462 seven-note scale forms that can be made within an octave of the 12-Tone Equal Temperament system. Inside, you will find all the 462 modes that exist, ordered and grouped by their mode families plus an analysis of the most musically interesting scales and their names - if any. All the examples of the scales are based on the note C. The main content of this book, was created using programming languages, databases and various technologies in order to achieve the desired ordering, grouping and presentation with no mistakes. No music editor was used, not even a note was put by hand.