Index of /pdf/packardBell/PB-250
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   DIR /pdf/packardBell
   DIR cinch
   DIR paper_tape_images
   DIR price_list
   DIR program_library
       PB250_Brochure_1960.pdf
       PB250_Command_List.pdf
       PBC1000_Rev4_PB250_Technical_Manual_Volume_1_19610715.pdf
       PBC1002_Rev1_PB250_Technical_Manual_Volume_2_19620316.pdf
       PBC1004_Rev1_PB250_Programming_Manual_19610315.pdf
       PBC1005_PB250_Interface_Manual_19610515.pdf
       PBC1007_HSB-1_High-Speed_Buffer_Register_HSB-N_Technical_Manual_19610815.pdf
       PBC1010_HSR1_High-Speed_Reader_Technical_Manual_19611101.pdf
       PBC1011_MX-1_Memory_Extension_Technical_Manual_19610915.pdf
       PBC1018_SNAP_I_Assembler_19620601.pdf
       PBC1020_ATRAN_Programming_System_Users_Manual_196206.pdf
       PBC4112_FX-1_Flexowriter_Troubleshooting_Notes_196406.pdf
       PBC4112_FX-1_Flexowriter_Troubleshooting_Notes_2ed_196301.pdf
       PBC4119_DR-1_Digital_Recorder_Notes_on_PB250-DR-1_Interface_19620301.pdf
       Raytheon_250_FORTRAN_II_Programming_and_Operating_Manual_196507.pdf
       Raytheon_250_Technical_Manual_Volume_1_19610715.pdf
       Raytheon_250_Technical_Manual_Volume_2_19620316.pdf
       SP-137_PB250_Pocket_Card.pdf
       SP-147_PB250_Programming_and_Reference_Manual.pdf
       SP-185_The_Engineers_Computer_1964.pdf