Index of /communications/geveke
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   DIR /communications
       Geveke_MKT-ITF-01_PDP-8E_interface_Teletype_33_Aug1974.pdf
       Geveke_MKT-ITF-06_CCITT-EIA_interface_Teletype_33_Jan1975.pdf
       Geveke_MKT-MCA-02_Motorcontrol_Teletype_33_Jul1975.pdf