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					Originally Posted by  JoeD
					 
				 
				Yes, but we're discussing log files and they have a lot of redundancy. 
 
For a book, yes I'd expect something in the range 2-4x compression, depending on the text. 
			
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 I agree, but I was actually thinking of the earlier poster's claim that a list of 540,000 e-mail addresses and names had been compressed to 37k. That's just... improbable ... no matter how you look at it.