Let's assume I was writing Zmodem in an object oriented language.
What are the applicable objects here?

Is there a Zmodem object, with two operations, send() and
receive()?

Is there a send object with an operation of zmodem() and
another operation of sealink() and another operation of
xmodem()?

Are zmodem send and receive simple operations, like
patmat()?

Are zmodem send and receive two separate objects, both with
one operation, perform()?  [this is what I think is the
solution at this exact instant of time].

The zmodem send and receive have some code that is common to
both.  

BFN.  Paul.
@EOT:

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