Aro Dictionary

inner Tantra
Tantrayana is divided into three outer and three inner Tantras. The outer Tantras regard enlightenment as external to oneself; the inner Tantras work with one’s own beginninglessly enlightened nature. Aro teaches the inner Tantras exclusively. The inner Tantras are Mahayoga, Anuyoga, and Atiyoga (also known as Dzogchen).