The CRAYON site offers one approach for visitors to specify their
preferences. Each visitor can set up the screen so that one sees only what one wants to.
FireFly uses affinity group comparisons.
Suppose there are 200 people who, just like you, love a musical group called "Band A". Lets say further that of the 200 people, 150 of them also like "Band B", an act you
are not familiar with. The odds are that you might like "Band B" as well!
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