A web site system includes an event history server system that persistently stores event data reflective of events that occur during browsing sessions of web site users, and makes such data available to other applications and services in real time. The server system may, for example, be used to record...http://www.google.com.au/patents/US7945637?utm_source=gb-gplus-sharePatent US7945637 - Server architecture and methods for persistently storing and serving event data
