At the turn of the century, SaaS ERP systems were introduced as a new pricing and systems management alternative to client/server systems. While originally weak in software depth and scalability, leading ERP systems such as Aplicor, Intacct and NetSuite have evolved to deliver functionally equivalent ERP applications, however, with the advertised advantages of the SaaS delivery model (e.g. subscription pricing, hosted delivery, fewer internal IT resources, etc.). These leading SaaS ERP applications are clearly replacing the middle market client/server ERP systems (most notably the Microsoft ERP products of Great Plains, Solomon, Navision and Axapta) in many situations, however, are not yet mature enough to take on the industry giants Oracle or SAP.