Slot machines are one of the most popular games in online casinos around the world. Per year, thousands of players worldwide join as well as over 70% of profit online casinos earn is precisely from the video slots. History of excellent slot game machines is long enough. The first ancestor of modern video slot was invented in 1891 in Brooklyn, New York. Slots were created on the basis of poker, and contain 50 cards glued on the 5 reels shirts down. layers for the rates used coin and pull the lever, resulting within the rotation of the reels. But since then there was the concept of the payments system, the winner was offered a zero cost drink or a cigar, or something else. This depended on the institution, that was installed a slot machine. To the player it was hard to win because the game was to be repaid, and not ruin the institution, often with the drums removed ten peaks and jack of hearts which it was tough to collect Royal Flush.