Wolfram Alpha Search: computation over lookup
Wolfram Alpha searching will be very logical.
Update 2009 May 11:
In its current state, there are many queries that WolframAlpha cannot answer, either because it does not understand the question or because it does not have the requisite data. For instance, it is stumped by queries like "obesity rate," "housing prices New York" or "unemployment San Francisco" (but it will answer "unemployment San Francisco County").
TECHNOLOGY / INTERNET
New Search Tool Aims at Answering Tough Queries, but Not at Taking on Google
By MIGUEL HELFT
Published: May 11, 2009
WolframAlpha doesn't work like Web search engines, but instead mines vast pools of data collected by the company.