11. The system as defined in claim 9, wherein the selector includes inventory management to allow selection of the entity vector based upon a presentation delivery schedule.
9. A system for selecting advertisements in a computer environment, comprising: a database of electronic advertisements; and an electronic advertisement management system, comprising: a converter capable of converting an observed behavior of a user computing device in the computer environment to a behavior vector, a profile adapter capable of modifying a profile vector indicative of the user with the behavior vector, a comparater capable of comparing the modified profile vector to a plurality of entity vectors, the entity vectors indicative of the electronic advertisements, so as to identify at least one entity vector closely associated with the observed behavior, and a selector accessing the electronic database with the identified entity vector so as to select at least one electronic advertisement to communicate to the user computing device.