https://manpages.ubuntu.com/manpages/questing/man1/sz.1.html
Ubuntu Manpage: sx, sb, sz - XMODEM, YMODEM, ZMODEM file send
XMODEM, YMODEM, ZMODEM file send
ubuntumanpagesxsbsz
https://cygwin.com/pipermail/cygwin/2001-June/055818.html
zmodem for cygwin (rz.exe and sz.exe)
cygwinrzexesz
https://manpages.ubuntu.com/manpages/questing/man1/rx.1.html
Ubuntu Manpage: rx, rb, rz - XMODEM, YMODEM, ZMODEM (Batch) file receive
XMODEM, YMODEM, ZMODEM (Batch) file receive
batch fileubuntumanpagerxrb
https://groups.google.com/g/comp.protocols.misc/c/kjQ3HWqR2Ck
zmtx/zmrx, zmodem implementation build from scratch
implementationbuildscratch
https://manpages.ubuntu.com/manpages/questing/man1/sb.1.html
Ubuntu Manpage: sx, sb, sz - XMODEM, YMODEM, ZMODEM file send
XMODEM, YMODEM, ZMODEM file send
ubuntumanpagesxsbsz
https://manpages.ubuntu.com/manpages/questing/man1/rz.1.html
Ubuntu Manpage: rx, rb, rz - XMODEM, YMODEM, ZMODEM (Batch) file receive
XMODEM, YMODEM, ZMODEM (Batch) file receive
batch fileubuntumanpagerxrb