The letters O.T.O. stand for Ordo Templi Orientis, the Order of Oriental Templars, or Order of the Temple of the East. O.T.O. is dedicated to the high purpose of securing the Liberty of the Individual and her or his advancement in Light, Wisdom, Understanding, Knowledge, and Power through Beauty, Courage, and Wit, on the Foundation of Universal Brotherhood. Ordo Templi Orientis is the first of the great Old Æon orders to accept The Book of the Law, received by Aleister Crowley in 1904 EV. This book proclaims a New Æon in human thought, culture and religion. The Æon arises from a single supreme injunction: the Law of Thelema, which is Do what thou wilt.
M∴M∴M∴ is the initiatory arm of O.T.O.
E.G.C. is the Gnostic Catholic Church, the ecclesiastical arm of O.T.O. It confers sacraments including the eucharist of the Gnostic Mass, baptism, confirmation, and ordination.
P.O. Box 643, Lafayette, IN 47902-0643, US