Thomson ISI has announced the Century of Science, an initiative to provide the research community with access to the world’s most influential scientific research throughout the 20th century. Currently, Web of Science coverage extends to 1945. The Century of Science initiative will expand the Web of Science to include bibliographic data from the highest impact scientific literature published between 1944-1900, adding nearly 850,000 articles from approximately 200 journals. The journals have been carefully selected by the Thomson ISI editorial team based on such criteria as citation patterns, geographic origin, and meaningful balance across scientific disciplines