This manual uses illustrations to outline for advanced and beginning students the rules of the CC-6 (1963). Use of technical terms has been kept to the minimum, which otherwise have been lucidly explained with illustrations. The main purpose of the book is to help Colon Classification students fully learn the practice of the CC. Continued teaching of the Colon Classification has prompted this updated edition. Some new class numbers for current subjects have been added. The endeavour is to keep the book relevant and current, despite the chronic handicaps of the older CC-6 system.