How Dewey find books?

As the amount of content on websites continues to expand, you hear a lot more about taxonomies these days. Basically a taxonomy is nothing more than a classification system - a way to group and organize your content.

I was in a public library the other day and was forced to navigate the Dewey Decimal System, one of the world's most famous taxonomies. The thought that came over me was "If this is so great, why don't bookstores use it?" Or, alternatively, with bookstores like Barnes and Noble and Borders geared so efficiently to the needs of the reading customer, why aren't libraries organized the same way?

Turns out that, in at least one place, they are.