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I usually joke that the hardest problem in computer science that is not yet solved is sending a file between two devices.



Notable example: freaking printers.


Email baby!


Doesn't fit the requirement of "between two devices". Email involves a lot of other servers on the way (pure network devices like routers doesn't really count I guess) :-P


Only up to 18 MB or so. ;)


uunencode the data and split into as many emails as necessary


And not always instant.




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