Rack-O is a Milton Bradley card game with the objective of obtaining 10 numbers, in numerical order, in one's hand. Score may be kept on a separate piece of paper, based upon either a custom system or the system provided in the rule book. Rack-O allows between 2-4 players, and is recommended for players age 8 and up. Rack-O was released in 1956 and is currently being produced by Winning Moves.