HDI is a professional association serving the technical service and support industry. It provides knowledge, relationships, collaboration, certification and training to over 128,000 professionals. The document discusses HDI's new membership model which includes several new membership levels to better fit members' needs and control over their career success. It also outlines the top 10 reasons to become an HDI member including networking, professional development, resources/research, and discounts. Local chapter membership and forums are highlighted as membership benefits. HDI offers conferences, events, training, certification and other services to support the technical service industry.