Index of /pdf/univac/military/1212
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   DIR /pdf/univac/military
       PX2846_CP-642B_TechDescr_Jul63.pdf
       Technical_Manual_for_Digital_Data_Computer_CP-642B_USQ-20_Volume_3_Sect_5-6_Sep67.pdf
       Technical_Manual_for_Digital_Data_Computer_DP-642B_USQ-20_Volume_1_Sect_1-3_Sep67.pdf
       Technical_Manual_for_Digital_Data_Computer_DP-642B_USQ-20_Volume_3_Sect_7_Sep67.pdf