Index of /pdf/burroughs/MediumSystems/B500
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   DIR /pdf/burroughs/MediumSystems
       1029477_B500_Brochure_196802.pdf
       1034287_B500_Brochure_196802.pdf
       1057205_B500_Master_Control_Program_II_Reference_197202.pdf
   IMG B500_1973.jpg
   IMG B500_Console.jpg
   IMG B500_cpu.jpg