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The main method for sending questions to the CXC is by using the HelpDesk facility. The HelpDesk form is reached from the link at the bottom of top page of the CXC web (i.e., at The information entered into the form is passed into our our Helpdesk Archive; we can more easily track the open and pending items with this tool. An introduction to the HelpDesk is also available from the HelpDesk form page. Questions can also be sent to the HelpDesk using email ( but we prefer submissions through the web.