BS>>I've not clue about the age, but something tells me Xmodem is older..

 > I also think it is older.  Older comm programs don't have
 > support for Zmodem,
 > but do have support for Xmodem.

Xmodem was developed by Ward Christensen in 1977, Ymodem somewhat later
& Zmodem later still.

cheers,

Lance

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