Abstract: An information retrieval system having a structured data store; and a signature generator configured to receive data from the structured data store, to create a category signature based on the data received from the structured data store, to receive search results from at least one crawler, and to generate a document signature based on the results from the at least one crawler. The system may also include a data store populated with a set of category signatures; and a search utility configured to receive a seed and to provide the seed to a plurality of search engines. Each search engine may be configured to generate a search result set, to parse each search result set, and to return a relevant data set. The crawler is configured to receive the relevant data set and to generate a second set of search results with a relevancy to a category. A signature comparator receives at least one document signature and at least one category signature and compares the two.