Abstract: A method of classifying an anonymous user communicating over a computer network, such as by age, gender, or personal interests, based on the content generated or otherwise communicated by the user. The method includes: (a) providing sets of reference attributes, wherein each set of reference attributes is associated with one of a number of personal profile classes; (b) analyzing the user content in order to extract a set of attributes corresponding to such content; (c) comparing the set of extracted attributes against the plural sets of reference attributes in order to find a close match; and (d) associating the user with the personal profile class of the matched set of reference attributes.