title: bootstrap css file - please explain what does the font code means
body: <p>I am looking at the bootstrap at bit more details and came across this</p>
  
  <pre><code>font: 0/0 a;
  </code></pre>
  
  <p>What does this code do? 0px size... 0px line height maybe? What is this a? what font family is that?</p>