1. Google
2. Yahoo
3. Webopedia
4. Bing
5. The Internet Archive
6. Dogpile
7. Ask/AJ/Ask Jeeves
8. Yippy
9. Mahalo
10. Sciencedirect: For scientific articles
2. Yahoo
3. Webopedia
4. Bing
5. The Internet Archive
6. Dogpile
7. Ask/AJ/Ask Jeeves
8. Yippy
9. Mahalo
10. Sciencedirect: For scientific articles