ne of the
      mechanisms provided by the operating system, such as the
      <code>select(2)</code> system call.  To enable this concurrency
      model, add the following option to the
      <code>
	<a href="Options.html#DefaultServer">Server_Strategy_Factory</a>
      </code>
      entry in your <code>svc.conf</code> file:
    </p>

    <blockquote>
      <code>
	<a href="Options.html#orb_concurrency">
	  -ORBConcurrency</a> reactive
      </code>
    </blockquote>

    <p>
      This is the default set