Ultrapedia is a search engine for recognized (OCR’d) books. So far we have recognized over 50 thousand public domain and out of copyright books; primarily focusing on factual reference material ...

We focus primarily on factual reference material including Encyclopedias and non-fiction text books. 

The Search Results Page: Returns the 100 most relevant items related to your search term with ten entries per page. Each page is divided into three sections: The Main Body, ...

Drilling down, or performing a search within a search allows you to narrow your search, for example choosing Rome from Places in the left hand side panel. Each search term ...

Parametric Browsing...

Federated Searching....