URI: 
       Index of /pdf/cdc/magtape
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   DIR /pdf/cdc
   DIR 601
   DIR 606
   DIR 607
   DIR 608
   DIR 92181
   DIR 92185
   DIR 9219x
   DIR CDC_patents
       60314400A_CDC_Institute_Magtape_Student_Manual_Jan1971.pdf
       86816400D_TB113_66x_Tape_Exerciser_Jul78.pdf
       CDC_6000_7000_File_Format_Study.pdf