Historical Rules · 1 February 2010
Rule 400.1
Official source text from the 1 February 2010 Rules release
A zone is a place where objects can be during a game. There are normally six zones: library, hand, battlefield, graveyard, stack, and exile. Some older cards also use the ante zone. Some casual variants use the command zone. (See Section 9, "Casual Variants.") Each player has his or her own library, hand, and graveyard. The other zones are shared by all players.