I disagree. Depending on your organization, Desktop Support and Helpdesk are the same. I am a Desktop Support Manager and my staff are Desktop Support Analysts. We run the helpdesk & try to solve problems over the phone, as well as site visits. In my opinion, whether you are considered a desktop support analyst (who works at then end-user's desk) or a Helpdesk analyst (who probably just answers the phone), in either case you are providing a level of support to the end-user community, and must have a technical & customer service oriented background.