The World Wide Web is a huge library of electronically-presented information, including reference materials, primary literature, secondary literature, data sets, personal opinions, etc.

World Wide Web resources are typically organized as sites or pages. You'll find scientific information offered on sites mounted by professional societies and biology departments. Such sites may offer links to data sets, electronic journals, online reference sources, images, and summaries of research projects. On innovative sites, you'll find resources that are impossible to provide in print, such as simulation models, animated images, searchable data sets, and hyperlinks to related material.