Slots are one of the most popular casino games that offer more payouts compared to the additional casino games of roulette, blackjack, poker etc. A slot machine is often referred to as a fruit machine or possibly a poker machine. Sometimes a slot machine is also termed as a one-armed bandit. Charles Fey first invented the one-armed bandit in 1887 dadosabertos.ufersa.edu.br wrote in a blog post San Francisco, United States of America. Initially he designed the machine with three spinning reels and five symbols comprising diamonds, hearts, spades, horseshoes and also 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 a further payout. Instead of the usual three spinning reels, an online video slot comprises five reels. Unlike the three reel versions, that offer just one payline, an online video slot can offer as many as nine paylines.