1) Employee Self-Service (ESS) enables employees to create, display, and change their own data in the intranet used at their enterprise. By enabling employees to access their own data, HR processes are standardized and simplified. As a result, employees in the Human Resources Department can concentrate on other tasks of greater strategic importance111
SAP R/3 is a three tier (Client-Server) architecture i.e., Presentation Layer, Application layer and Database layer.
Presentation layer is nothing but the your Work satation front end
Application layer is your transaction data where it is processed
Database layer is your backend system
To know more on the Client Server Architecture goto the following sites
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