Bitcoin Core
What does it mean?
is a digital successor or "reference client" of the bitcoin cryptocurrency that is now traded all over the world, though its legality varies based on jurisdiction. Bitcoin Core represents the succession from Bitcoin to Bitcoin QT and then on to Bitcoin Core. Alternately, Bitcoin Core is a separate project from various other divergent bitcoin projects developed through hard and soft forks, including Bitcoin Classic, Bitcoin Cash, Bitcoin XT, Bitcoin Unlimited and LiteCoin.