title: What does a type followed by _t (underscore-t) represent?
body: <p>This seems like a simple question, but I can't find it with the Stack Overflow search or Google. What does a type followed by a <code>_t</code> mean? Such as</p>
  
  <pre><code>int_t anInt;
  </code></pre>
  
  <p>I see it a lot in C code meant to deal closely with hardware—I can't help but think that they're related.</p>