SAP ABAP Table/Structure Field TST21 - FUSER (TST21) is used by

• Class (4)
• Function Module (7)
• Program (9)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Class	CL_ST05_KERNEL_INTERFACE Method: WRITE_RAW_TRACE_STATE	ST05 Interface to Kernel	ST05	BASIS	SAP_BASIS
2	Class	CL_ST05_KERNEL_INTERFACE Method: READ_RAW_TRACE_STATE	ST05 Interface to Kernel	ST05	BASIS	SAP_BASIS
3	Class	CL_ST05_TRACE_MAIN_M Method: ACTIVATE_TRACE	ST05 Trace Model Class	ST05	BASIS	SAP_BASIS
4	Class	CL_ST05_TRACE_MAIN_M Method: READ_TRACE_STATE	ST05 Trace Model Class	ST05	BASIS	SAP_BASIS