Arachnids play a vital role in the web of life, yet many of us possess a limited knowledge of this amazing class of animals. Hosted by the International Society of Arachnology (ISA), the Arachnology Home Page serves as an informational Internet resource center on arachnids. The site contains links to approximately 2,000 related sites and organizes them by arachnid order and by various subjects. The site also organizes links under a number of spider-specific categories. Note: To reach the Arachnology Home Page, site visitors must select the Arachnology Pages link on the ISA home page menu.