[otrs] Where can I get a listing of all OTRS variables e.g. <OTRS_USER, <OTRS_CUST

Gang, Where can I get a complete listing of all the system defined variables i.e. etc. they have them for almost everything, but right now I have to search other admin section or the config files to find them all, very time consuming, is there a listing of all variable? Thank you Thank you, Michael W. Belz Jr. Systems Administrator, Sky River Management (702) 336-9418 AIM: SimbaSRM