Hi,
This is from http://www.floridadetectives.com/emailtracing.htm
Internet Profiling.
While closely related to Email Tracing, Internet Profiling is the process of discovering what a particular individual has been doing in the past on the Internet; what web sites he/she has been visiting; what they have written to chat rooms, guest books, newsgroups and directories; what chat programs (ICQ, AIM, etc.) they use; identifying their screen names, other email addresses and an for collecting an abundance of invaluable background information on companies, entities and individuals. Most people believe everything they do on line will remain anonymous and could never be found in the vast realms of cyberspace ... they couldn't be more wrong!
Best wishes, Clive