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From satellites to the London Olympics, all in one career

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Discover why the number 6174 is so mysterious.

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September 2008
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twenty questions

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How can a 3 hour long film like the Lord of the Rings fit on a single DVD? Hw cn U rd txt msgs? How do MP3s make music files smaller, so they can be downloaded faster off the Internet? All these things rely on the mathematics of data compression.

Tags: data compression : twenty questions : efficient coding : Huffman coding : entropy : universal coding