Here we would like to draw your attention to OSC4 transaction code in SAP. As we know it is being used in the SAP BC-SRV (Basis Services / Communication Interfaces in Basis) component which is coming under BC module (BASIS).OSC4 is a transaction code used for Maintenance of Appointment Type Grps in SAP.
It comes under the package SZTK.
Transaction OSC4 technical data table
|Purpose||Maintenance of Appointment Type Grps|