Today's Word of the Day means...
agent a·gent (ā'jənt)
A force or substance, such as a chemical, that causes a change.
A substance that can bring about a chemical reaction or a biological effect. Compare reagent.
In the client-server model, the part of the system that performs information preparation and exchange on behalf of a client or server. Especially in the phrase "intelligent agent" it implies some kind of automatic process which can communicate with other agents to perform some collective task on behalf of one or more humans.