Academic
search engines are more academically based than search engines like
Google or Yahoo. They are designed for research, and have much less
clutter than some of the other popular search engines.
Biznar --Business related topics
Mednar --Medical topics
Science Research --Science only search
Scirus --Scientific Information
Scitopia --Science and Technology search
TechXtra --Includes Engineering, Math and Computing topics
World Wide Science --Science search