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Summarily SAP ERP is a later version of SAP R/3.
SAP has ceased developing R/3 but still support it until the end of 2009, extendable to 2012.
SAP R/3 is designed for client-server architecture.
SAP ERP is powered by SAP NetWeaver, integration and application platform that enables Enterprise Services Architecture.
The main delta functional changes can be viewed here:
http://solutionbrowser.erp.sap.fmpmedia.com/
Last Answered:
Jul 8 2009 0:34 AM GMT by Bigday 
195 pts.