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On Tue, 11 May 2004, Steven C. Barr wrote:

> Probably the only form of "inuitively obvious" data storage is the shellac
> 78...you can run your finger along the groove and faintly hear the recorded
> sound! OTOH, there is nothing about a CD that tells you it contains data,
> let alone the complicated algorithms used to extract that data...

I am reminded of the disc of recordings which was prepared for the Voyager
spacecraft. As I recall that the design of a player was included with the
disc...I have often wondered if those "do it yourself" directions were
given to any of us, if we could build one of the players!

Karl