Abstract: This computer device provides a system for selecting the winners of both horse and dog races, and it consists primarily of a stationary card, having a circular area, in which is imprinted the weights of the horses and dogs, as indicated on track programs. It further includes a rotatable disc, with openings to view the weights of horses and dogs, and the program "odds" are imprinted alongside of each of the openings, the bet selection being the lesser sum of the addition of each of the weights of the horses and the last figure of the "odds" on each horse, the same being applied to dog races.