Answer Posted / marichamy.a
SAP R/3 is sap realtime 3 tier architechure. The three
tiers are application layer, presentation layer and
Database layer.
Application Layer: The central process in the R/3
application layer is the dispatcher. Together with the
operating system,the dispatcher controls the resources for
the R/3 applications.
Presentation Layer: The presentation interface SAP GUI (GUI
= Graphical User Interface) implements the platformspecific
input and output functions of the R/3 System.
Database Layer: Stores and MAintenance of SAP database.
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