Dear Perl AI-ers, Here are some additional references for methods using statistical means. If for any reason you cannot find a document in this reference list, feel free to email me, and I will provide it to you--as long as you don't pin me for copyright infringement! Here's the list: Apté, Chidanand, Fred Damerau, Sholom M. Weiss. "Towards Language Independent Automated Learning of Text Categorization Models." Proceedings of the Seventeenth Annual International ACM-SIGIR Conference on Research and Development in Information Retrieval. 1994, p. 23-30. Goh, Wei Boon, Kok Leong Low, Hwee Tou Ng. "Feature Selection, Perceptron Learning, and a Usability Case Study for Text Categorization." Proceedings of the Twentieth Annual International ACM-SIGIR Conference on Research and Development in Information Retrieval. 1997, p. 67-73. best, na'im