Kriya Yoga
Kriya means "ritual action". Known as the Yoga of Ritual Action, Kriya Yoga is union with the Infinite through a certain action or rite, and consists of the preliminary steps of the ashtanga yoga — austerity (tapas), study (swadhayaya), and dedication of one's works to God (ishwara-pranidhana). Mentioned by Sage Patanjali in the Yoga Sutras, this system of yoga was introduced to the West in the 1920s by Paramahansa Yogananda, author of the well-known Autobiography of a Yogi.