Index of /pdf/burroughs/Disk/B9480
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   DIR /pdf/burroughs/Disk
       1053436_9480_9481-12_Cartridge_Disk_Parts_197710.pdf
       1054392_9480_9481-12_Cartridge_Disk_Technical_197710.pdf
       2102133_9480-22_Disk_Tech_Vol_2_Parts_198202.pdf