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From: er1m+@andrew.cmu.edu (Ethan J. Rasiel)
Newsgroups: comp.periphs,rec.music.cd,rec.music.misc,comp.misc
Subject: card punches for storage
Message-ID: <Mc9tPpa00Wg1NFdXBg@andrew.cmu.edu>
Date: 8 May 91 06:13:09 GMT
References: <P73BU7@xds13.ferranti.com> <B+H+4FG@cs.widener.edu> <52905@nigel.ee.udel.edu>,
	<3048@cod.NOSC.MIL>
Organization: Carnegie Mellon, Pittsburgh, PA
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In-Reply-To: <3048@cod.NOSC.MIL>

It seems to me that as far as long-term accuracy, the punch cards would
be most likely to survive the 25-year period.  But the question is this:
exactly how many of those cards would be needed to store the equivalent
of one CD?  For purposes of calculation, let's say a 45 minute long
album.  I hope someone calculates this.  I probably could if I knew how
much information you could fit on one card.  But I would guess that it
would be a BIG stack of cards, when you consider that the pits on a CD
are microscopic, and the holes on the card are very macroscopic.  

Ethan