Interactive taxonomic functionality enables visitors to explore relationships between concepts and access content within the nanomanufacturing domain. InterNano is an information portal and subject repository for nanomanufacturing hosted by the National Nanomanufacturing Network at the University of Massachusetts Amherst, which combines a dynamic open source content management system (Joomla!) for managing original content with the reliable EPrints repository software system for managing archived publications, educational material, and workshop presentations. Because nanomanufacturing is a small, interdisciplinary subdomain of nanotechnology, an important component of the project is a specialized taxonomy for domain definition and information discovery. The InterNano Taxonomy is a unique, custom-built terminology to describe the nanomanufacturing enterprise—from areas of application to nanomanufacturing processes—with three levels of granularity. The Taxonomy is fully integrated into the InterNano system, linking all tagged content both in Joomla! and in EPrints. By browsing the taxonomy either through a hierarchical list or through a tag cloud, visitors can review and access all of the tagged content within the InterNano portal and repository. InterNano has expanded its taxonomic functionality to enable a more interactive user experience. Spring graphs display Taxonomy terms with respect to their relationship to other taxonomy terms via content tagging and reflect terms’ relative usage statistics. The spring graphs are generated with open source libraries for Python: matplotlib and NetworkX. This capability allows users to explore the different concepts within the nanomanufacturing domain as well as review and access tagged content throughout the integrated InterNano system.