Index of /pdf/ibm/650/ades
       _______________________________
       
   DIR /pdf/ibm/650
       NAVORD_4209_Automatic_Digital_Encoding_System_II_Feb56.pdf
       NAVORD_4411_Automatic_Digital_Encoding_System_II_Part_2_Nov56.pdf
       NAVORD_4412_An_ADES_Encoder_For_The_650_Calculator_Dec56.pdf