Slots are among the most popular casino games which provide more payouts when compared with another casino games of roulette, blackjack, poker etc. A slot machine is usually referred to as a fruit machine or possibly a poker machine. Sometimes a slot machine can also be termed as a one-armed bandit. Charles Fey first invented the one-armed bandit in 1887 in San Francisco, United States of America. Initially he designed the equipment with three spinning reels and five symbols comprising diamonds, hearts, spades, horseshoes and a liberty bell.

Later many improvements were made to Fey's machine. In 1996 the WMS Industries Inc developed the very first video slot machine, which gave the facility of winning yet another payout. In place of the normal three spinning reels, an online video slot comprises five reels. Unlike the three reel versions, which offer just click Ait one payline, an online video slot can offer as many as nine paylines.