Here we would like to draw your attention to SU3 transaction code in SAP. As we know it is being used in the SAP BC-SEC (Security in Basis) component which is coming under BC module (BASIS).SU3 is a transaction code used for Maintain Users Own Data in SAP.
It comes under the package SUSR.When we execute this transaction code, SAPMSUU0O is the normal standard SAP program that is being executed in background.
Transaction SU3 technical data table
|Purpose||Maintain Users Own Data|