title: What does OAT mean?
body: <p>We know that Dalvik uses APK, DEX, and ODEX files.
  And we know this abbreviation means via AOSP source or Developers site.</p>
  
  <p>(like this - <a href="https://source.android.com/devices/tech/dalvik/dex-format.html">https://source.android.com/devices/tech/dalvik/dex-format.html</a>)</p>
  
  <ul>
  <li>DEX means Dalvik EXcutable file.</li>
  <li>ODEX means Optimized Dalvik EXcutable file.</li>
  <li>APK means Android PacKage.</li>
  </ul>
  
  <p>ART (Android RunTime) uses OAT and ART, but they do not explain the meaning anywhere.</p>
  
  <p>Does anyone know the meaning of these shortened words?</p>