title: In Ruby on Rails, what does "resource" mean?
body: <p>I see the word <code>resource</code> in many different places like: <em>resource Routing</em>, <em>resourceful controller</em>, and <em>resources: photos</em>. What does <code>resource</code> actually mean?</p>
  
  <p>One more question: What does <em>RESTful route</em> mean?</p>