An interactive computer configuration system is an aid for a sales person or a customer to make it easy to grasp and configure a huge configuration problem. The user interacts with the computer system and makes many choices successively, and a configuration engine checks each choice for validity. The...http://www.google.com/patents/US6272390?utm_source=gb-gplus-sharePatent US6272390 - Method for interactive configuration and computer readable medium encoded with a program for performing said method