Scientology Chronology - September 1955
| September 2, 1955 | Anything-Everything-Nothing | |
| September 7, 1955 | Hubbard, FBI, American Psychological Association, Scientologists, LSD | |
| September 7, 1955 | L. Ron Hubbard, FBI, Scientologist Ed Clark, Phoenix, FBI | |
| September 14, 1955 | The Unknown Datum-A Mest Shaking Lecture | |
| September 16, 1955 | Selling | |
| September 21, 1955 | Postulates 1, 2, 3, 4 in Processing-New Understanding of Axiom 36 | |
| September 30, 1955 | Psychiatrists | |
|