Before the existence of the slot machine there was a widespread use of a machine similar to slots but that used to have 5 reels and 50 cards on each reel, the game consisted in pulling the handle to turn the reel and hope to get a winning combination of cards, by that time the player usually got free beers for a “pair of kings” and a “royal flush” would usually paid the drinks or cigars. Because of the complications of calculating the payout it was left to the business owner to determine the payout of the different winning combinations. Later Charles Fey invented a simpler device, consisting of 3 reels with 5 symbols in each, and an automatic coins payment system, which became so popular that later it was introduced at Casinos targeted to the casual gamers. The device came to be known as Slots Machines.

The union between slots, computers and poker came when on 1979 when the International Game Technology company invented Draw Poker, which was very popular between unconfident customers with issues with the early machines video poker machines, because they can’t not see the reels spinning. The success came because the terminal they invented had a television like graphics device and a solid state computer; those machines were contemporary to the first personal computers.