Hi,
You can check list of objects using SE16 -
1) RSDCUBE - Directory of InfoCubes.
2) RSRREPDIR - Directory of all reports
3) RSDODSO - Directory of all ODS Objects.
Please go threw the below link to get other details -
http://wiki.scn.sap.com/wiki/display/BI/Important+Tables+in+SAP+BW+7.x
Hope this helps.
Regards,