1. Funnel web professional. http://www.activeconcepts.com .
2. Hit list commerce. http://www.marketwave.com .
3. Webtrends log analyzer. http://www.webtrends.com .
4. World wide web committee web usage characterization activity http://www.w3.org/WCA .
5. R. Agrawal and R. Srikant. Fast algorithms for mining association rules. In Proc. of the 20th VLDB Conference, pages 487–499, Santiago, Chile, 1994.