With so many options available for answering questions on the network, this guide is intended as a subject-specific tool for reference librarians to use when assisting patrons in retrieving AIDS-related information. It focuses on the major electronic sites, resources, listservs, online journals, and databases on HIV/AIDS that are available free of charge on the network, listed in alphabetical order. The Internet is constantly evolving, and while the resources in this guide have been carefully examined online for content and accuracy, files and sites are continuously being eliminated, added, and updated. Users, therefore, are encouraged to be flexible and adaptable when browsing, and to try new modes of access on the network.