FI Business Area
http://help.sap.com/saphelp_erp60_sp/helpdata/en/5f/1fabe04aee11d189740000e8322d00/frameset.htm

Assignment of Business Area and Partner Business Area
http://help.sap.com/saphelp_erp60_sp/helpdata/en/9b/f3480e43f411d39a2b0000e8a5999a/content.htm