Paul Nelson started writing the code for his first search engine in 1989. Ten years later “RetrievalWare” had grown to be a market leading search engine with $50m annual sales. Today, RetrievalWare is owned by Microsoft, and it is still in use by customers on all five continents. During his 20+ years in the search engine industry, Paul has been involved in hundreds of search engine implementations, of all shapes and sizes. Recently, Paul has been engaged with major US Government projects in support of the Obama administration's freedom of information initiative, and he has architected a range of open source-based search applications for large commercial customers. Paul is the Chief Architect at Search Technologies, an independent search implementation services company, where he provides architectural oversight for customer projects and conducts design, technology research and training.