Boolean searches offer limitless opportunities to fine tune.
Google Claims to have 560 million fully indexed pages, this site is a favorite among our librarians. Google offers relevance in results by ranking pages retrieved. First tries are almost always successful, and the simplicity of the page is less daunting than many others. Also has a category browsing feature, and advanced Boolean options. Metacrawler Metacrawler submits your searches to 14 other search engines, some included on this page, to take advantage of the particular strengths of each engine's algorithm.