Abstract: A system for retrieving information related to a topic of interest, comprising: (a) a finder for finding a location of a computerized source of information, the information being divided into at least one message, such that the source of information is a located source of information, the finder being a self-operated software program; (b) a source repository for storing the location of the located source of information; (c) a sampler for sampling the located source of information by retrieving the at least one message from the located source of information, such that the at least one message is a retrieved message, the sampler being a self-operated software program; (d) a matcher for determining a matching score for the retrieved message, the matcher being a self-operated software program; and (e) a message repository for storing the retrieved message and the matching score.