title: Twips, pixels, and points, oh my!
body: <p>or "How I learned to stop worrying and learned to love measurement systems"</p>
  
  <p>I wanted a central spot that I can refer to later to give me a quick low-down on various units of measurement used in programming.  SO seemed the best place to put it, and while I could go ahead and answer the question myself, y'all are a much smarter bunch than I, so I might as well let you do it.</p>
  
  <p>Please pick one unit that you're familiar with, use "#name" in the first line to give it as the heading (making it easy to find) and define it within your answer.  Please do not duplicate - add comments or edit existing answers rather than adding a new answer.  Similar units are still seperate - so please don't define em and en in the same answer.  If a unit is exactly the same as another unit, add a line for "aliases" below the heading.</p>
  
  <p>If it's a particularly obscure measurement type, please link to a second reference so people don't downvote you because they've never heard of it.</p>
  
  <ul>
  <li><a href="https://stackoverflow.com/questions/604203/twips-pixels-and-points-oh-my/604220#604220">Point</a></li>
  <li><a href="https://stackoverflow.com/questions/604203/twips-pixels-and-points-oh-my/604270#604270">Pica</a></li>
  <li><a href="https://stackoverflow.com/questions/604203/twips-pixels-and-points-oh-my/604276#604276">Twips</a></li>
  <li><a href="https://stackoverflow.com/questions/604203/twips-pixels-and-points-oh-my/604326#604326">Pixel</a></li>
  <li>Em</li>
  <li>En</li>
  <li>CPI</li>
  <li><a href="https://stackoverflow.com/questions/604203/twips-pixels-and-points-oh-my/605911#605911">DPI</a></li>
  </ul>
  
  <p>I'm seeing a lot of downvoting - I suppose people believe this doesn't add value to StackOverflow's community.  Please consider commenting below if you feel this doesn't add to the community, or if you think this is a bad question.  I'm interested in improving it if you have any suggestions.</p>
  
  <p><em>The great thing about standards is there are so many to choose from!</em></p>
  
  <p>-Adam</p>