Biology

Animal Diversity Web (ADW) is an online database of animal natural history, distribution, classification, and conservation biology at the University of Michigan.

The CDC A-Z Index is a navigational and informational tool that makes the CDC.gov Web site easier to use. It helps you quickly find and retrieve specific information. The A-Z index is structured so that synonyms, acronyms, and cross-referencing provide multiple ways for you to access the topics and features on CDC.gov. The index includes common and scientific terms to meet the needs of consumers as well as health professionals.

The NLM History of Medicine Division (HMD) collects, preserves, makes available, and interprets for diverse audiences one of the world’s richest collections of historical material related to health and disease. Spanning ten centuries, encompassing a variety of digital and physical formats, and originating from nearly every part of the globe.