The Chernobyl Database project is developing and maintaining an information to provide researchers with data and resource materials relating to the Chernobyl nuclear accident of April 1986. The system is the official United States repository for Chernobyl data. The system includes a collection of Chernobyl-related documents, a database of bibliographic references, and a collection of radiological measurements records. In addition, projects have been developed to make the resources more accessible and easy to use. These products include a personal-computer-based bibliographic search system (ChernoLit{trademark}), two printed bibliographies, and a personal- computer-based radiological measurements database system (ChernoDat).