lAthough almost a decade has passed since the second edition of this work was published, this encyclopedia's reputation as a high-quality scholarly work has not diminished. Guided by an advisory board comprising leading researchers (including eight Nobel laureates), editor in chief Meyers (Ramtech, Inc.) used a peer review process that produced over 780 articles written by experts. The coverage in this third edition has expanded to include molecular biology, biochemistry, and biotechnology. The decision to eliminate articles on military technology contributed to the deletion of about 200 articles; however, nearly 300 articles were added to cover new topics such as molecular electronics, nanostructured materials, tissue engineering, superstring theory, and the World Wide Web. The remaining articles were either updated or rewritten. Averaging 17-18 pages in length, the well-written articles present detailed information in a logical, organized manner. All follow a basic format: outline, glossary, defining statement, main body, cross references, and bibliography.