Boss is Yahoo!'s open search web services platform which is newly launched. BOSS (Build your Own Search Service) is for developers or companies who wants to launch web-scale search products. Boss provides search that utilize the entire Yahoo! Search index.
BOSS (Build your Own Search Service) is different – it’s a truly open API with as few rules and limitations as possible. Currently the following uses this Boss Search.
hakia is a semantic search engine. This uses Yahoo Boss Technology.
The Cluuz search engine is different from traditional search engines in that we don't only show the links to result pages but we also show entities (people, companies, organization, phone numbers, concepts, etc.) and images that are extracted from within the search results. It is
like peering into the documents to see ahead what is important. This helps you find the results that you are looking for faster.