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START, the world's first Web-based question answering system, has been on-line and continuously operating since December, 1993. It has been developed by Boris Katz and his associates of the InfoLab Group at the MIT Computer Science and Artificial Intelligence Laboratory. Unlike information retrieval systems (e.g., search engines), START aims to supply users with "just the right information," instead of merely providing a list of hits. Currently, the system can answer millions of English questions about places (e.g., cities, countries, lakes, coordinates, weather, maps, demographics, political and economic systems), movies (e.g., titles, actors, directors), people (e.g., birth dates, biographies), dictionary definitions, and much, much more. Below is a list of some of the things START knows about, with example questions. You can type your question above or select from the following examples.

System One offers a range of new semantic search, analytics and collaboration products that de- crease the costs of daily infor- mation workflows, enable new business strategies and are more flexible as well as cost effective.

System One offers a range of new semantic search, analytics and collaboration products that de- crease the costs of daily infor- mation workflows, enable new business strategies and are more flexible as well as cost effective.

"EKOSS (Engineering/Environmental Knowledge Ontology-based Semantic Search) has been developed for sharing expert knowledge using semantic web technologies. The website provides a collaborative knowledge sharing environment where knowledge experts can submit advertisements of the knowledge resources that they have developed, such as research papers, databases and computer simulation models. "

A semantic wiki engine is a specific kind of wiki engine that extends the wiki's function of collaborative content management with Semantic Web technologies. It is thus also a kind of Semantic content management system. Some, but not all, semantic wikis should also be classified as Ontology editor or Semantic annotation tool.

SOBOLEO is a system for web-based collaborative engineering of SKOS ontologies and annotation of web resources. Users collaboratively create a taxonomy, use it to annotate web resources and use it as background knowledge during search.

TextMap is a search engine for entities: the important (and not so important)people, places, and things in the news. Our news analysis system automatically identifies and monitors these entities, and identifies meaningful relationships between them.