CADR (DNSSEC Authenticated DNS Registry)
CADR (a somewhat contrieved acronym for "DNSSEC Authenticated DNS Registry") is a registry for DNS data. I.e. CADR is a system in the same ballpark as registries run by TLDs to manage delegation information or, in some environments, run by registrars to manage delegation information for customers for further propagation to a registry (typically for a TLD).
CADR is different from other registries by utilizing the in-band authentication of DNS data provided by DNSSEC. This enables a new level of simplicity in the management of the parent-child relation at a zone cut (aka a delegation point) and perhaps that makes CADR the first example of an application where DNSSEC adds simplicity rather than complexity.