title: Are there any real file types with non-ASCII file extensions
body: <p><code>.txt</code>
  <code>.pdf</code>
  <code>.exe</code></p>
  <p>etc...</p>
  <p>Obviously, you <em>can</em> create a file with any extension you want.</p>
  <p>But are there any <strong>real</strong> examples of files legitimately having non-ASCII file extensions?</p>