| September 26, 1956 | Flow Line for Personnel | L. Ron Hubbard writes HCOPL 'Flow Line for Personnel '. | |
| October 26, 1956 | Gradient Scale of Personnel Procurement | L. Ron Hubbard writes HCOPL 'Gradient Scale of Personnel Procurement '. | |
| December 11, 1956 | Tape Color Code | L. Ron Hubbard writes HCOPL 'Tape Color Code '. | |
| January 25, 1957 | Concerning the Separateness of Dianetics and Scientology | L. Ron Hubbard writes HCOPL 'Concerning the Separateness of Dianetics and Scientology'. | |
| January 25, 1957 | Referrals to Field | L. Ron Hubbard writes HCOPL 'Referrals to Field'. | |
| February 13, 1957 | "We Will No Longer..." | L. Ron Hubbard writes HCOPL '"We Will No Longer..."'. | |
| February 28, 1957 | Hats | L. Ron Hubbard writes HCOPL "Hats". | |
| April 8, 1957 | Advisory Committee | L. Ron Hubbard writes HCOPL 'Advisory Committee'. | |
| April 9, 1957 | Bulletin Board | L. Ron Hubbard writes HCOPL 'Bulletin Board'. | |
| April 9, 1957 | Communication Center | L. Ron Hubbard writes HCOPL 'Communication Center'. | |
| April 23, 1957 | "HCO Is Now Handling..." | L. Ron Hubbard writes HCOPL '"HCO Is Now Handling..."'. | |
| April 28, 1957 | HCO Board of Review, Goal | L. Ron Hubbard writes HCOPL 'HCO Board of Review, Goal'. | |
| May 1, 1957 | Comm Center, Arrangement Of | L. Ron Hubbard writes HCOPL 'Comm Center, Arrangement Of'. | |
| May 2, 1957 | Dissemination | L. Ron Hubbard writes HCOPL 'Dissemination'. | |
| May 9, 1957 | Mail | L. Ron Hubbard writes HCOPL 'Mail'. | |
| May 16, 1957 | Clarification of Invoicing Items | L. Ron Hubbard writes HCOPL 'Clarification of Invoicing Items'. | |
| May 18, 1957 | Policy on Signatures in Publications | L. Ron Hubbard writes HCOPL 'Policy on Signatures in Publications'. | |
| May 23, 1957 | Responsibility for Issue | L. Ron Hubbard writes HCOPL 'Responsibility for Issue'. | |
| June 24, 1957 | "When a New Post Is Created..." | L. Ron Hubbard writes HCOPL '"When a New Post Is Created..."'. | |
| July 2, 1957 | Financial Reports, Washington, DC | L. Ron Hubbard writes HCOPL 'Financial Reports, Washington, DC'. | |
| July 5, 1957 | Lonesome? | L. Ron Hubbard writes HCOPL 'Lonesome?'. | |
| August 15, 1957 | Ministerial Qualifications | L. Ron Hubbard writes HCOPL 'Ministerial Qualifications'. | |
| August 19, 1957 | "Release All Certificates..." | L. Ron Hubbard writes HCOPL '"Release All Certificates..."'. | |
| September 2, 1957 | Field Certificates | L. Ron Hubbard writes HCOPL 'Field Certificates'. | |
| September 5, 1957 | Testing | L. Ron Hubbard writes HCOPL 'Testing'. | |