1983-02-23 /bb-ev83b-bm/01/tcpip-sources/ftp4.mac 1983-02-23 /bb-ev83b-bm_longer/01/tcpip-sources/ftp4.mac 1983-02-23 /tops20_v7_0_tcpip_distribution_tape/01/tcpip-sources/ftp4.mac