Though the rules of slot machines have changed very little in the past, perhaps few people know that Charles Fey invented the slot gamble machine in 1895. The main difference between the slot of the very first of 900 and those that exist today, virtual and physical, is to be found in the electronic system at the heart of the operation. For the rest, now play as it once was:

The player operates a lever that activates the wheels on the screen to spin around themselves. The wheels are designed symbols and images that will determine the outcome of the roll.

When the wheels stop, a series of images appears within the center line (line payment or "pay line" in English) of the game screen. In the event the wheels have stopped on the exact same image, completing the pay line, the player or the player has won a payout calculated on the series of numbers which have appeared in the online payment.