httpproxy.gopherspace.dk:75/1/proxy/https://bitsavers.org/pdf/strombergDatagraphix/SC_4020/

       Index of /pdf/strombergDatagraphix/SC_4020
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   DIR /pdf/strombergDatagraphix
       9500056_S-C_4020_Computer_Recorder_Programmers_Reference_Manual_Jun1968.pdf
       NAA_4020_Subroutine_Library_Oct1963.pdf
       S-C_4020_Computer_Recorder_Information_Manual_Aug1964.pdf