Shaiva sadhus are renunciates devoted to Shiva, and Vaishnava sadhus are renouncers devoted to Vishnu (or his avatar like Rama or Krishna). The Vaishnava sadhus are sometimes referred to as vairagis. Less numerous are Shakta sadhus, who are devoted to Shakti. Within these general divisions are numerous sects and subsects, reflecting different lineages and philosophical schools and traditions often referred to as sampradayas. Each sampradaya has several orders called parampara based on the lineage of the founder of the order. Each sampradaya and parampara may have several monastic and martial akharas.