Homeopathy is based on certain principles and philosophy, which warns us not to neglect even a minute expression, taking the whole organism into consideration at the same time. Thus, the task of a physician is not only restricted to the understanding of the phenomenon of a disease, but also goes one step further in resolving it with cure. Each case is a new piece with a number of symptoms and traits. In order to simplify the case and to figure out a single similimum for a case, we need a repertory. This detailed course will deal with the basic concepts of Repertory and answer questions like What is Repertory? The Need of repertory, Scope of Repertory along with the limitations of the subject.