title: What's the meaning of Amazon's URL?
body: <p>I want to fetch some information from Amazon, but the URL seems very complex. Is there anybody know what's the meaning of amazon's URL?</p>
  
  <p>for example: the Ceiling Fans &amp; Accessories page's url is: </p>
  
  <pre><code>http://www.amazon.com/s/ref=lp_2619525011_nr_n_6?rh=n%3A2619525011%2Cn%3A%212619526011%2Cn%3A495362&amp;bbn=2619526011&amp;ie=UTF8&amp;qid=1387193124&amp;rnid=2619526011
  </code></pre>
  
  <ol>
  <li>What's the meaning of <code>ref=lp_2619525011_nr_n_6</code></li>
  <li>What's the meaning of <code>rh=n%3A2619525011%2Cn%3A%212619526011%2Cn%3A495362</code></li>
  <li>What's the meaning of <code>bbn=2619526011</code></li>
  <li>What's the meaning of <code>ie=UTF8</code></li>
  <li>What's the meaning of <code>qid=1387193124</code></li>
  <li>What's the meaning of <code>rnid=2619526011</code></li>
  </ol>