URI:
       Index of /pdf/abekas
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   DIR /pdf
       Abekas_A60_A64_Digital_Disk_Recorder_Preliminary_Interface_Manual_Aug87.pdf
       Abekas_A60_Digital_Disk_Recorder_Ethernet_Manual_Aug88.pdf
       Abekas_A60_Digital_Disk_Recorder_Ethernet_Preliminary_Manual_Dec87.pdf
       Abekas_A60_Digital_Disk_Recorder_Operations_Manual_Mar88.pdf
       Abekas_A60_Digital_Disk_Recorder_Technical_Manual_Jan88.pdf