P, and other I/O support for non-web applications. <a href="dart-io/dart-io-library.html">[...]</a>
              </dd>              <dt id="dart:isolate">
                <span class="name"><a href="dart-isolate/dart-isolate-library.html">dart:isolate</a></span>               
              </dt>
              <dd>
                Concurrent programming using <em>isolates</em>:
independent workers that are similar to threads
but don't share memory,
communicating only via messages. <a href="dart-isolate/dar