Here is a list of the contents of the directory 
Computer.History/CDC.Manuals.scans
Other manuals can be found at bitsavers under http://bitsavers.informatik.uni-stuttgart.de/pdf/cdc/
The pictures below show images of selected manuals.

CDC_3100_3200_3300_3500_Computer_Systems_FORTRAN_60057600C
CDC_3100_3200_3300_Computer_Systems_SCOPE_Utility_60130200
CDC_3100_3200_SCOPE-Disk_SCOPE_60171200
CDC_3600_Computer_System_60021300
CDC_COMPASS_Version_3_Ref_Man_covers_60492600
CDC_CONNECT_60462560
CDC_Cyber_200_Model_205_Computer_System_Hardware_Reference_Manual_60256020
CDC_Cyber_205_User_Guide_84002390
CDC_Cyber_205.VAST.User_Guide.84002690
CDC_Cyber_Common_Utilities_Ref_Man_60495600
CDC_Cyber_Loader.RevJ.part1.60429800.pdf
CDC_Cyber_Loader.RevJ.part2.60429800.pdf
CDC_Cyber200_Assembler_60485010
CDC_Cyber70_COMPASS_General_Information_60343400
CDC_FORM.RevD.60496200.pdf
CDC_Fortran_200_Version_1_Reference_Manual_60480200
CDC_Fortran_Extended_Version_4_Reference_Manual_60497800
CDC_Fortran_Extended_Version_4_to_5_Conversion_Aid_60483000
CDC_Fortran_Version_5_Common_Library_Mathematical_Routines_Ref_Man
CDC_Fortran_Version_5_Reference_Manual_60481300
CDC_Fortran_Version_5_Users_Guide_60484000
CDC_Instruction_Timing_extract_60367200
CDC_Modify_Reference_Manual_60450100
CDC_NOS2.Ref.Vol3.RevE.60459680
CDC_Pascal_Verson_1_Ref_Man_60497700
CDC_Remote_Host_Facility.60460620
CDC_RHF_Handbook.IBM.60459050.pdf
CDC_RHF_Handbook.NOS1.60459060.pdf
CDC_RHF_Usage.60460620.RevE.pdf
CDC_SCOPE_2_Loader_reference_Manual_60454780
CDC_SCOPE_2.1_Diagnostic_Handbook_60344100
CDC_SCOPE_2.1_Reference_Manual_60342600
CDC_SCOPE_2.1_USER'S_GUIDE_60372600
CDC_Update_Version_1_Reference_Manual_60449900
CDC_VSOS_2.2.Differences.pdf
CDC_VSOS_UG_for_FOTRAN.60455390.RevB.pdf
CDC_VSOS_Version_2_Installation_Handbook_60459440
CDC_VSOS_Version_2_Reference_Manual_Vol_1_of_2_60459410
CDC_VSOS_Version_2_Reference_Manual_Vol_2_of_2_RevE.60459420
CDC_VSOS_Version_2_Reference_Manual.Vol2.60459420.RevJ.package.pdf
CDC_VSOS_Version2_Installation_Handbook.60459440.RevJ.pdf
CDC.Manuals.docx
Control_Data_Cyber_70_Model_72_Computer_System_System_Description_60347000
Control_Data_Cyber_70_Models_72,73,74_Instruction_Descriptions_60347300
Cyber_205_Usage,SN3200.RevC.pdf
ETA_CDC_Cyber_205_CIA_Reference_Manual_PUB-1057.pdf
IMG_5972.HEIC
IMG_5974.HEIC
IMG_5975.HEIC
IMG_5975.jpg
NOS.ON-LINE_MANUALS_SYSTEM.RevA.1983.pdf
Notes_on.VSOS.Ref..Vol1.RevE.pdf