On the survey forms, the records were tagged by several codes: LBL Archives and Records file number, National Archives and Records Administration (NARA) accession number, and shelf location numbers. Each number provides an access point for retrieval of the selected records. Pertinent records were further identified by the record creators, including division, department, research group or individual. Each record has been described by the following elements: title, size, media, arrangement, classification, brief record series description, personal and organizational names, and test site information. The following division and departmental testing and fallout documentation: records contain nuclear ADMINISTRATION DIVISION Business and Office Protective Services. Archives and Records DIRECTOR’S OFFICE The Business Manager’s Office (also listed as DC Files, the initials of the Laboratory’s first administrative officer, Donald Cooksey) was originally a part of the Director’s Office. The Business Manager’s Office was later installed as a separate division. Since survey records were created at a time prior to reorganization, they can be found under than Administration. Director Ernest 0. the Director’s Office Lawrence’s Office. Manhattan Engineering District. ENGINEERING DIVISION Occupational rather Administration. - Health -- Environmental Health a& Safety The Engineering Division originally included Occupa-~ tional Health or Health of Laboratory. Engineering. Occupational Health was later reorganized as an individual division the Of the many records collected, we have inventoried and described only those records relevant to nuclear testing and fallout. Health Physics Group Safety Services Personnel Dosimetry Office Engineering & Computer Sciences R&D. Facilities Management -- Medical Services ii