Abstract: Computer based procurement system and method. The method comprises receiving search input for item to be purchased and searching one or more electronic catalogs to identify at least one item in the one more catalogs that relates to the search input. The method also comprises determining a uniform taxonomy code (UTC) associated with the at least one item and accessing one or more pre-configured purchasing control rules associated with the UTC. Moreover, the method comprises performing action associated with purchase order generation based at least upon the one or more pre-configured purchasing control rules.