CiteSeer is an open source scientific literature digital library and search engine that focuses primarily on the literature in computer and information science.
Machine indexing of papers in computer science and neuroscience. At this stage some coverage of mathematics and geospatial science is also included and there are plans to extend the discipline scope to include biology, physics and the remaining hard sciences. Citations and references in the text are used to identify links between papers as well as the most influential papers. Records also highlight key phrases found in similar papers.