Modern repertories are introduced in the homoeopathic world to cope up with the advancement of the symptomatology of the disease and indexing of the new provings done in the field of materia medica. The intoduction of the modern repertories is an exceptional contribution in the evolution of repertories. The main purpose of the modern repertories is to update the repertories by including more rubrics as well as the medicines which cover the symptoms physicians experienced in their daily clinical practice. This course on modern repertories will discuss various modern repertories briefly and then go through the aspects of different modern repertories including their philosophy, plan and construction, the working method and even the scope and limitations of the different modern repertories.