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The site has been revamped and now the codebase of this page allows you to listen to audio files without downloading the audio file iteself.

What I have also done is coded the page to allow entire folders to be downloaded. The download link is to the right of folders inside each folder on the front page.

KEY: sc=physically scanned by me, HQ=High Quality

Email = info@lrhmaterials.com
Backup email in case you don't get a response within 2 days - cas@matrixfiles.com

Folder ..   
6307XX — HCO Technical Form — Line Plot, First Series, Helatrobus Implants, 45 Trillion [U5372-016].pdf 6307XX — HCO Technical Form — Line Plot, First Series, Helatrobus Implants, 45 Trillion [U5372-016].pdf 560KB Dec 20 2025 06:45:57 AM
620426 — HCO Bulletin — Recommended Processes HGC [U5372-036].pdf 620426 — HCO Bulletin — Recommended Processes HGC [U5372-036].pdf 260KB Dec 20 2025 06:45:59 AM
620607 — HCO Bulletin — Rundown on Routine 3GA [U5372-037].pdf 620607 — HCO Bulletin — Rundown on Routine 3GA [U5372-037].pdf 108KB Dec 20 2025 06:46:02 AM
620801 Issue 2 — HCO Bulletin — Routine 3GA - Nulling Drills for Nulling by Mid Ruds [U5372-039].pdf 620801 Issue 2 — HCO Bulletin — Routine 3GA - Nulling Drills for Nulling by Mid Ruds [U5372-039].pdf 277KB Dec 20 2025 06:45:59 AM
620801 — HCO Bulletin — Routine 3GA - Goals - Nulling by Mid Ruds [U5372-038].pdf 620801 — HCO Bulletin — Routine 3GA - Goals - Nulling by Mid Ruds [U5372-038].pdf 341KB Dec 20 2025 06:46:02 AM
620813 — HCO Bulletin — Rock Slams and Dirty Needles [U5372-040].pdf 620813 — HCO Bulletin — Rock Slams and Dirty Needles [U5372-040].pdf 94KB Dec 20 2025 06:45:56 AM
620821 — HCO Bulletin — 3GA - Line Wording [U5372-041].pdf 620821 — HCO Bulletin — 3GA - Line Wording [U5372-041].pdf 63KB Dec 20 2025 06:46:02 AM
620831 — HCO Bulletin — 3GA - Dynamic Assessment by Rock Slam [U5372-042].pdf 620831 — HCO Bulletin — 3GA - Dynamic Assessment by Rock Slam [U5372-042].pdf 65KB Dec 20 2025 06:45:59 AM
620901 — HCO Bulletin — 3GA - Dynamic Assessment by Rock Slam [U5372-043].pdf 620901 — HCO Bulletin — 3GA - Dynamic Assessment by Rock Slam [U5372-043].pdf 65KB Dec 20 2025 06:46:02 AM
620908 — HCO Bulletin — 3GA - To Be Goals Line Listing [U5372-045].pdf 620908 — HCO Bulletin — 3GA - To Be Goals Line Listing [U5372-045].pdf 92KB Dec 20 2025 06:45:56 AM
620908 — HCO Bulletin — Account of Congress Goal [U5372-044].pdf 620908 — HCO Bulletin — Account of Congress Goal [U5372-044].pdf 198KB Dec 20 2025 06:45:59 AM
620912 — HCO Bulletin — 3GA - Expanded Line Wording Correction [U5372-046].pdf 620912 — HCO Bulletin — 3GA - Expanded Line Wording Correction [U5372-046].pdf 32KB Dec 20 2025 06:45:59 AM
620912 — HCO Bulletin — 3GA - Expanded Line Wording Correction [U5372-047].pdf 620912 — HCO Bulletin — 3GA - Expanded Line Wording Correction [U5372-047].pdf 132KB Dec 20 2025 06:45:58 AM
620919 — HCO Bulletin — 3GA - Tips on Dynamic Assessment - Rules of Thumb [U5372-048].pdf 620919 — HCO Bulletin — 3GA - Tips on Dynamic Assessment - Rules of Thumb [U5372-048].pdf 132KB Dec 20 2025 06:46:02 AM
620923 — HCO Bulletin — 40-Line List on a Doingness Goal, A [U5372-049].pdf 620923 — HCO Bulletin — 40-Line List on a Doingness Goal, A [U5372-049].pdf 109KB Dec 20 2025 06:45:59 AM
621001 — HCO Bulletin — 3GA - Listing by Tiger Buttons - 114 New Lines for Listing [U5372-050].pdf 621001 — HCO Bulletin — 3GA - Listing by Tiger Buttons - 114 New Lines for Listing [U5372-050].pdf 217KB Dec 20 2025 06:46:00 AM
621003 — HCO Bulletin — Tiger Drilling [U5372-051].pdf 621003 — HCO Bulletin — Tiger Drilling [U5372-051].pdf 87KB Dec 20 2025 06:46:03 AM
621015 — HCO Bulletin — Goal Finder's Model Session [U5372-052].pdf 621015 — HCO Bulletin — Goal Finder's Model Session [U5372-052].pdf 94KB Dec 20 2025 06:45:55 AM
621018 — HCO Bulletin — 3GA - Listing by Prehav [U5372-054].pdf 621018 — HCO Bulletin — 3GA - Listing by Prehav [U5372-054].pdf 99KB Dec 20 2025 06:46:04 AM
621018 — HCO Technical Letter — Listing Goals [U5372-053].pdf 621018 — HCO Technical Letter — Listing Goals [U5372-053].pdf 103KB Dec 20 2025 06:46:02 AM
621107 Issue 2 — HCO Bulletin — Routine 3-21 - The Twenty-One Steps - Finding Goals [U5372-056].pdf 621107 Issue 2 — HCO Bulletin — Routine 3-21 - The Twenty-One Steps - Finding Goals [U5372-056].pdf 226KB Dec 20 2025 06:45:58 AM
621107 — HCO Bulletin — Wrong Goals - Importance of Repair Of [U5372-055].pdf 621107 — HCO Bulletin — Wrong Goals - Importance of Repair Of [U5372-055].pdf 241KB Dec 20 2025 06:46:04 AM
621123 — HCO Bulletin — Routine 2-12 - Opening Procedure by Rock Slam - An HPA-HCA Skill [U5372-059].pdf 621123 — HCO Bulletin — Routine 2-12 - Opening Procedure by Rock Slam - An HPA-HCA Skill [U5372-059].pdf 226KB Dec 20 2025 06:45:55 AM
630201 — HCO Bulletin — Routine 3 - All Class III and IV Auditors [U5372-003].pdf 630201 — HCO Bulletin — Routine 3 - All Class III and IV Auditors [U5372-003].pdf 310KB Dec 20 2025 06:46:01 AM
630222 — HCO Bulletin — Routine 3M - Rundown by Steps [U5372-015].pdf 630222 — HCO Bulletin — Routine 3M - Rundown by Steps [U5372-015].pdf 544KB Dec 20 2025 06:46:03 AM
630225 — HCO Bulletin — R2 - R3 [U5372-017].pdf 630225 — HCO Bulletin — R2 - R3 [U5372-017].pdf 84KB Dec 20 2025 06:45:57 AM
630306 — HCO Bulletin — Correction to HCO Bulletin of February 22, 1963 [U5372-012].pdf 630306 — HCO Bulletin — Correction to HCO Bulletin of February 22, 1963 [U5372-012].pdf 80KB Dec 20 2025 06:45:58 AM
630308 — HCO Bulletin — Use of the Big Middle Rudiments [U5372-010].pdf 630308 — HCO Bulletin — Use of the Big Middle Rudiments [U5372-010].pdf 70KB Dec 20 2025 06:46:03 AM
630309 — HCO Bulletin — Routine 2 and 3M - Correction to 3M Steps 13, 14 [U5372-005].pdf 630309 — HCO Bulletin — Routine 2 and 3M - Correction to 3M Steps 13, 14 [U5372-005].pdf 250KB Dec 20 2025 06:46:01 AM
630313 — HCO Bulletin — End of a GPM, The [U5372-007].pdf 630313 — HCO Bulletin — End of a GPM, The [U5372-007].pdf 358KB Dec 20 2025 06:45:56 AM
630313 — HCO Bulletin — Routine 2 and 3M - Additional Correction to 3M Steps 13, 14 [U5372-004].pdf 630313 — HCO Bulletin — Routine 2 and 3M - Additional Correction to 3M Steps 13, 14 [U5372-004].pdf 61KB Dec 20 2025 06:46:01 AM
630317 — HCO Bulletin — R-R3 - Corrections - Typographicals and Added Notes - HCO Bulletin of March 13th, 1963 Issue II [U5372-014].pdf 630317 — HCO Bulletin — R-R3 - Corrections - Typographicals and Added Notes - HCO Bulletin of March 13th, 1963 Issue II [U5372-014].pdf 138KB Dec 20 2025 06:46:00 AM
630330 — HCO Bulletin — Routine 3M Simplified [U5372-013].pdf 630330 — HCO Bulletin — Routine 3M Simplified [U5372-013].pdf 798KB Dec 20 2025 06:45:56 AM
630406 — HCO Bulletin — R3M2 - What You Are Trying to Do in Clearing [U5372-024].pdf 630406 — HCO Bulletin — R3M2 - What You Are Trying to Do in Clearing [U5372-024].pdf 350KB Dec 20 2025 06:46:01 AM
630406 — HCO Bulletin — R3M2 - What You Are Trying to Do in Clearing [U5372-060].pdf 630406 — HCO Bulletin — R3M2 - What You Are Trying to Do in Clearing [U5372-060].pdf 294KB Dec 20 2025 06:45:56 AM
630408 — HCO Bulletin — Listing and Nulling (Corrects HCO Bulletin of April 6th, 1963 - R3M2) [U5372-019].pdf 630408 — HCO Bulletin — Listing and Nulling (Corrects HCO Bulletin of April 6th, 1963 - R3M2) [U5372-019].pdf 142KB Dec 20 2025 06:45:57 AM
630417 — HCO Bulletin — R3M2 - Re-Do Goals Found on this Pattern - A Complete GPM Pattern - (Replaces all former Line Plots) [U5372-011].pdf 630417 — HCO Bulletin — R3M2 - Re-Do Goals Found on this Pattern - A Complete GPM Pattern - (Replaces all former Line Plots) [U5372-011].pdf 261KB Dec 20 2025 06:45:56 AM
630423 — HCO Bulletin — Routine 3M2 - Handling the GPM [U5372-008].pdf 630423 — HCO Bulletin — Routine 3M2 - Handling the GPM [U5372-008].pdf 371KB Dec 20 2025 06:46:01 AM
630424 — HCO Bulletin — Routine 3M2 - Tips - The Rocket Read of a Reliable Item [U5372-018].pdf 630424 — HCO Bulletin — Routine 3M2 - Tips - The Rocket Read of a Reliable Item [U5372-018].pdf 199KB Dec 20 2025 06:45:55 AM
630428 — HCO Bulletin — Routine 3 - An Actual Line Plot [U5372-023].pdf 630428 — HCO Bulletin — Routine 3 - An Actual Line Plot [U5372-023].pdf 487KB Dec 20 2025 06:45:58 AM
630430 — HCO Bulletin — Routine 3 (Correction to HCOB 23 April, 1963 - Handling the GPM) [U5372-020].pdf 630430 — HCO Bulletin — Routine 3 (Correction to HCOB 23 April, 1963 - Handling the GPM) [U5372-020].pdf 50KB Dec 20 2025 06:45:56 AM
630508 — HCO Bulletin — Routine 3 - The Nature of Formation of the GPM [U5372-033].pdf 630508 — HCO Bulletin — Routine 3 - The Nature of Formation of the GPM [U5372-033].pdf 276KB Dec 20 2025 06:46:02 AM
630511 — HCO Bulletin — Routine 3 - Heaven [U5372-006].pdf 630511 — HCO Bulletin — Routine 3 - Heaven [U5372-006].pdf 531KB Dec 20 2025 06:45:57 AM
630511 — HCO Bulletin — Routine 3 - Heaven [U5372-032].pdf 630511 — HCO Bulletin — Routine 3 - Heaven [U5372-032].pdf 469KB Dec 20 2025 06:46:04 AM
630512 — HCO Bulletin — Routine 3 - RI Form (GPM RI Form Corrected) [U5372-021].pdf 630512 — HCO Bulletin — Routine 3 - RI Form (GPM RI Form Corrected) [U5372-021].pdf 211KB Dec 20 2025 06:46:03 AM
630520 — HCO Bulletin — Routine 3N - Proper Programming - Fast Blowing Ris [U5372-061].pdf 630520 — HCO Bulletin — Routine 3N - Proper Programming - Fast Blowing Ris [U5372-061].pdf 168KB Dec 20 2025 06:46:00 AM
630604 — HCO Bulletin — Routine 3 - Handling GPMs [U5372-002].pdf 630604 — HCO Bulletin — Routine 3 - Handling GPMs [U5372-002].pdf 382KB Dec 20 2025 06:45:55 AM
630613 — HCO Bulletin — New Training Drills [U5372-001].pdf 630613 — HCO Bulletin — New Training Drills [U5372-001].pdf 258KB Dec 20 2025 06:46:02 AM
630714 — HCO Bulletin — Routine 3N - Line Plots [U5372-022].pdf 630714 — HCO Bulletin — Routine 3N - Line Plots [U5372-022].pdf 363KB Dec 20 2025 06:46:00 AM
630724 — HCO Bulletin — R3N Corrections [U5372-034].pdf 630724 — HCO Bulletin — R3N Corrections [U5372-034].pdf 164KB Dec 20 2025 06:46:04 AM
630724 — HCO Bulletin — R3N Corrections [U5372-035].pdf 630724 — HCO Bulletin — R3N Corrections [U5372-035].pdf 154KB Dec 20 2025 06:46:02 AM
630925 — HCO Bulletin — Listing and Nulling for Locks, Not Ris [U5372-026].pdf 630925 — HCO Bulletin — Listing and Nulling for Locks, Not Ris [U5372-026].pdf 383KB Dec 20 2025 06:46:00 AM
630928 — HCO Bulletin — Scientology PCs - Important - Actual Goals [U5372-062].pdf 630928 — HCO Bulletin — Scientology PCs - Important - Actual Goals [U5372-062].pdf 349KB Dec 20 2025 06:46:04 AM
631121 — HCO Bulletin — Data Taken from Recent LRH Lecture [U5372-063].pdf 631121 — HCO Bulletin — Data Taken from Recent LRH Lecture [U5372-063].pdf 146KB Dec 20 2025 06:45:58 AM
631121 — Technical Advice Letter — Data Taken from Recent LRH Lecture [U5372-025].pdf 631121 — Technical Advice Letter — Data Taken from Recent LRH Lecture [U5372-025].pdf 176KB Dec 20 2025 06:46:04 AM
631121 — Technical Advice Letter — Data Taken from Recent LRH Lecture [U5372-057].pdf 631121 — Technical Advice Letter — Data Taken from Recent LRH Lecture [U5372-057].pdf 150KB Dec 20 2025 06:45:58 AM
631121 — Technical Advice Letter — Data Taken from Recent LRH Lecture [U5372-058].pdf 631121 — Technical Advice Letter — Data Taken from Recent LRH Lecture [U5372-058].pdf 165KB Dec 20 2025 06:46:01 AM
640108 — HCO Bulletin — Scientology VI [U5372-009].pdf 640108 — HCO Bulletin — Scientology VI [U5372-009].pdf 143KB Dec 20 2025 06:45:56 AM
680504 — HCO Bulletin — Dianetic Courses - Stuck Pictures [U5372-064].pdf 680504 — HCO Bulletin — Dianetic Courses - Stuck Pictures [U5372-064].pdf 88KB Dec 20 2025 06:46:01 AM
691221 — HCO Bulletin — Solo Auditing and R6EW [U5372-065].pdf 691221 — HCO Bulletin — Solo Auditing and R6EW [U5372-065].pdf 195KB Dec 20 2025 06:45:59 AM
XXXXXX — HCO Bulletin — Danger - Black Dianetics [U5372-029].pdf XXXXXX — HCO Bulletin — Danger - Black Dianetics [U5372-029].pdf 171KB Dec 20 2025 06:45:59 AM
XXXXXX — HCO Bulletin — Elements of a Game [U5372-027].pdf XXXXXX — HCO Bulletin — Elements of a Game [U5372-027].pdf 52KB Dec 20 2025 06:45:59 AM
XXXXXX — HCO Bulletin — Evaluator's Know-How Chart [U5372-028].pdf XXXXXX — HCO Bulletin — Evaluator's Know-How Chart [U5372-028].pdf 151KB Dec 20 2025 06:46:01 AM
XXXXXX — HCO Bulletin — Loophole in Guarded Rights, The [U5372-030].pdf XXXXXX — HCO Bulletin — Loophole in Guarded Rights, The [U5372-030].pdf 169KB Dec 20 2025 06:46:03 AM
XXXXXX — HCO Bulletin — Records of the Mind Are Permanent [U5372-031].pdf XXXXXX — HCO Bulletin — Records of the Mind Are Permanent [U5372-031].pdf 162KB Dec 20 2025 06:45:59 AM
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