System requirements: PC with CD-ROM reader and software, Internet browser. Title from disc label. Shipping list no.: 2007-0020-E. "Mastered: 5/07." In GIF and PDF formats. Includes all 50 states, the District of Columbia, Puerto Rico and the Virgin Islands. Also available via Internet from the National Atlas web site. Address as of 8/23/07: http://nationalatlas.gov/printable/congress.html; current access via PURL.