| June 4, 1959 | Definition of a Hot File | L. Ron Hubbard writes HCOPL 'Definition of a Hot File'. | |
| July 9, 1959 | Definition of Scientology, Written by LRH for Legal When Setting Up HAS I Ltd | L. Ron Hubbard writes HCOB 'Definition of Scientology, Written by LRH for Legal When Setting Up HAS I Ltd'. | |
| July 22, 1959 | Actual Working Definition of Psychology | L. Ron Hubbard writes HCOB 'Actual Working Definition of Psychology'. | |
| August 9, 1963 | Definition of Release | L. Ron Hubbard writes HCOB 'Definition of Release'. | |
| January 25, 1965 | Definition of "Terminal" | L. Ron Hubbard writes HCOB 'Definition of "Terminal"'. | |
| February 3, 1966 | SECEDs, Definition and Purpose | L. Ron Hubbard writes HCOPL 'SECEDs, Definition and Purpose'. | |
| January 28, 1967 | Fliers, Definition and Use | L. Ron Hubbard writes HCOPL 'Fliers, Definition and Use'. | |
| March 23, 1967 | A Refined Definition of P | L. Ron Hubbard writes HCOPL 'A Refined Definition of P'. | |
| May 2, 1967 | Responsibility, Definition Of | L. Ron Hubbard writes HCOB 'Responsibility, Definition Of'. | |
| July 25, 1967 | Knowledge, Definition Of | L. Ron Hubbard writes HCOPL 'Knowledge, Definition Of'. | |
| August 11, 1967 | Organization, Definition Of | L. Ron Hubbard writes HCOPL 'Organization, Definition Of'. | |
| October 12, 1967 | Operational, Definition Of | L. Ron Hubbard writes HCOPL 'Operational, Definition Of'. | |
| October 14, 1968 | Definition of Recall | L. Ron Hubbard writes HCOB 'Definition of Recall'. | |
| November 1, 1968 | OvertMotivator Definitions | L. Ron Hubbard writes HCOB 'OvertMotivator Definitions'. | |
| April 23, 1969 | Dianetics, Basic Definitions | L. Ron Hubbard writes HCOB 'Dianetics, Basic Definitions'. | |
| March 20, 1970 | Ally, Definition Of | L. Ron Hubbard writes HCOB 'Ally, Definition Of '. | |
| September 21, 1970 | Study Definitions | L. Ron Hubbard writes HCOB 'Study Definitions'. | |
| November 18, 1970 | PR Definition | L. Ron Hubbard writes HCOPL 'PR Definition'. | |
| April 27, 1971 | Education, Definition Of | L. Ron Hubbard writes HCOB 'Education, Definition Of '. | |
| October 5, 1971 | Propaganda by Redefinition of Words | L. Ron Hubbard writes HCOPL 'Propaganda by Redefinition of Words'. | |
| August 18, 1972 | Grammar Definition | L. Ron Hubbard writes HCOB 'Grammar Definition'. | |
| November 11, 1976 | Statistic Change, HCOs and Qual, Definitions | L. Ron Hubbard writes HCOPL 'Statistic Change, HCOs and Qual, Definitions'. | |
| August 11, 1978 | Rudiments, Definitions and Patter | L. Ron Hubbard writes HCOB 'Rudiments, Definitions and Patter'. | |
| September 3, 1978 | Definition of a Rock Slam | L. Ron Hubbard writes HCOB 'Definition of a Rock Slam'. | |
| December 10, 1978 | Gross Book Sales-Definition | L. Ron Hubbard writes HCOPL 'Gross Book Sales-Definition'. | |