Here we would like to draw your attention to SU0 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).SU0 is a transaction code used for Maintain Own Fixed User Values in SAP.
It comes under the package SUSR.
Transaction SU0 technical data table
|Purpose||Maintain Own Fixed User Values|