Scientology operates through its churches and missions. They are locally governed, autonomous corporations licensed to use Scientology materials, to teach the basic tenets of the faith, to conduct auditing procedures, and to help individuals reach the state of clear. Any church member who has attained this state and wishes to become an operating thetan can attend one of the Advanced Organization centers at which training for the OT-I–V levels is made available. Hubbard, who had headed the church, resigned all offices in 1966 and for a time concentrated on the development of the post-clear, OT levels. Much of this research ...(100 of 2059 words)