Abstract: A system for retrieving and integrating data from multiple databases over a computer network is provided. According to one aspect of the system, the system includes an agregation server and a number of agents. The aggregation server is capable of communicating with the agents via a computer network such as the Internet. Each agent is designed to communicate locally with a number of data sources. A user is able to retrieve data from the data sources by contacting the aggregation server which, in turn, causes the appropriate agents to retrieve the requested data from the relevant data sources.