A purebred beagle. A purebred dog typically refers to a dog of a modern dog breed with a documented pedigree in a stud book and may be registered with a breed club that may also be part of a national kennel club. Purebred dog may also be used in a different manner to refer to dogs of specific dog types and landraces that are not modern breeds.
The SpaceX reusable launch system development program is a privately funded program to develop a set of new technologies for an orbital launch system that may be reused many times in a manner similar to the reusability of aircraft.
Falcon 9. Falcon 9 is a family of two-stage-to-orbit launch vehicles, named for its use of nine first-stage engines, designed and manufactured by SpaceX. The Falcon 9 versions are Falcon 9 v1.0 (retired), Falcon 9 v1.1 (retired), and the current Falcon 9 Full Thrust, a partially-reusable launch system.