What is the difference between Net weaver and ECC (or) ERP?

                      What is the difference between Net weaver and ECC (or) ERP?

1. Net weaver is Abap stack & java stack
    ECC is also Abap stack & java stack
2. Net weaver is 4 soft ware components they are SAP_BASIS, SAP_ABA, PI_BASIS, SAP _ BW
    ECC6.0 is 35+ software components & ECC5.0 is 25+ software components
(Here ECC 4 application software components mainly)

       a. Net weaver software components
           SAP_BASIS, SAP_ABA, PI_BASIS _ SAP _ BW

       b. Application software components
           SAP_AP, SAP_APPL, SAP-HR

       c. Enterprise software components
           EA_HE, EA_APPL, EA_RETAIL, EA_PS (public sector)

       d. Industrial software components
           IA_OIL, IA_PHARMA Ext…..

3. Java stack – EP, Xi/Pi, BW/BI, MI/KM

       a.Whenever you install the EP – EP CORE, AS JAVA
       b.Whenever you install the MI – AS ABAP, AS JAVA
       c.Whenever you install the PI – AS ABAP, AS JAVA
       d.Whenever you install the EP CORE – AS JAVA
       e.Whenever you install the BI JAVA – AS JAVA, EP, EP CORE
       f.Whenever you install the DI – AS JAVA