Hello Bo,

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

XModem was apparently developed in 1977 (I thought it was from the late
1970s, but I had to look up the actual year
;-)  OSI was apparently developed during the 1980s, although
it was probably influenced by an earlier 4-layer model from the U.S.
Department of Defense.

- Andy Ball

 * SLMR 2.1a *

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