Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The cancer Biomedical Informatics Grid, or caBIG is an initiative of the National Cancer Institute, part of the National Institutes of Health. The caGrid computer network and software support caBIG. caBIG is a voluntary virtual informatics infrastructure that connects data, research tools, scientists, and organizations to leverage their combined strengths and expertise in an open federated environment with widely accepted standards and shared tools.