Arctos is an ongoing effort to integrate access to specimen data, collection-management tools, and external resources on the internet. Arctos is both a community and a comprehensive collection management information system. As a community, it is a collaboration among multiple scientific collections that serves data on over 3M natural history museum records. Arctos’ multidisciplinary collection management information system integrates access to diverse types of collections (botany, entomology, herpetology, mammalogy , ornithology, paleontology, parasitology) and data, including specimen records, observations, tissues, endoparasites and ectoparasites, stomach contents, fieldnotes and other documents, and media such as images, audio recordings, and video. This system is intended for use by collection managers, curators, collection users, scientists, educators, and anyone interested in natural history information. In addition to rigorously displaying all that is known about a museum record, Arctos provides solutions to managing and integrating collections data with object tracking (via barcodes or RFID tags), transactions (loans, borrows, accessions, permits), geospatial information (coordinates and descriptive data), agents (people and organizations), and usage (publications, projects, and citations).