an assembly of Scientologists held in any of various cities around the world for a presentation of Dianetics and/or Scientology materials. Many congresses were addressed directly by Ron. Others were based upon tapedLRH lectures or films on a particularsubject. A congress also sometimes included seminars and co-audits for attendees. In this lecture, Ron is referring to Unification Congress of Dianeticists and Scientologists, held from 28 - 30 December 1954. —9th ACC Volume 1 Approved Glossary