Why we use SE01 SE09 and SE10 in SAP? Below are the uses of these three (1)SE01:-It is mainly used for Correction & Transport Organizer. And this will combines features of both SE09 and SE10. (2)SE09:-It is mainly used for Workbench Organizer. And this can be used as DEVELOPMENT of transports. (3)SE10:-It is mainly used Customizing Organizer. And when we run SE10 in SAP ERP we will GET same screen as in T-Code SE09 of transport organizer.