Orion may be one of the first examples of a more semantically rich and expressive search engine:

"Take a search such as the American Revolution as an example of how the system works. Orion© would bring up results with extracts containing this phrase. But it would also give results for American History, George Washington, American Revolutionary War, Declaration of Independence, Boston Tea Party and more. You obtain much more valuable information from every search."

Sounds like it's worth exploring 😉