Unix-unix cp over serial line, also includes cu program.
Taylor UUCP is a free implementation of UUCP and is the standard UUCP used on the GNU system. If you don't know what UUCP is chances are, nowadays, that you won't need it. If you do need it, you've just found one of the finest UUCP implementations available.
1.07bin/cubin/uuchkbin/uucicobin/uuconvbin/uucpbin/uulogbin/uunamebin/uupickbin/uuschedbin/uustatbin/uutobin/uuxbin/uuxqtaarch64-darwinaarch64-freebsdaarch64-genodeaarch64-linuxaarch64-netbsdaarch64-noneaarch64-windowsaarch64_be-nonearm-nonearmv5tel-linuxarmv6l-linuxarmv6l-netbsdarmv6l-nonearmv7a-darwinarmv7a-linuxarmv7a-netbsdarmv7l-linuxarmv7l-netbsdavr-nonei686-cygwini686-darwini686-freebsdi686-genodei686-linuxi686-netbsdi686-nonei686-openbsdi686-windowsjavascript-ghcjsloongarch64-linuxm68k-linuxm68k-netbsdm68k-nonemicroblaze-linuxmicroblaze-nonemicroblazeel-linuxmicroblazeel-nonemips-linuxmips-nonemips64-linuxmips64-nonemips64el-linuxmipsel-linuxmipsel-netbsdmmix-mmixwaremsp430-noneor1k-nonepowerpc-netbsdpowerpc-nonepowerpc64-linuxpowerpc64le-linuxpowerpcle-noneriscv32-linuxriscv32-netbsdriscv32-noneriscv64-linuxriscv64-netbsdriscv64-nonerx-nones390-linuxs390-nones390x-linuxs390x-nonevc4-nonewasm32-wasiwasm64-wasix86_64-cygwinx86_64-darwinx86_64-freebsdx86_64-genodex86_64-linuxx86_64-netbsdx86_64-nonex86_64-openbsdx86_64-redoxx86_64-solarisx86_64-windows