select acs_sc_impls.impl_name from acs_sc_impls, acs_sc_bindings, acs_sc_contracts where acs_sc_contracts.contract_name = 'dotlrn_applet' and acs_sc_contracts.contract_id = acs_sc_bindings.contract_id and acs_sc_impls.impl_id = acs_sc_bindings.impl_id