s (commands) that can operate
  on the selected content.  The command can either be part of the current
  activity, or the system can pass the selected content along to 
  an operation in another activity (by way of an 
  <a href="../../../guide/practices/ui_guidelines/activity_task_design.html#intents">intent</a>).
</p>

<p>
  For example, in an email message list, a user can touch &amp; hold on
  an email message to open a Context menu containing commands to read,
  archive, or delete the message. 
</p>

