The most famous casino game, the slot machines are not new in the market, their history is more than a century old, an American mechanic Charles Fey is credited for the invention of the first slot machine in 1887. Fey’s slot machine had three reels, each having five symbols over it; these were spades, diamonds, horse shoes, diamonds, hearts and Liberty bells. The liberty bells, if appeared in a combination of three, gave the highest pay out of all, that is why this first ever slot machine was called a Liberty Bell.

California was Fey’s home state and gambling got banned in it soon after the Liberty Bell became famous, but Fey could still not meet up the day by day growing demand for the slot machine from other states.

Liberty Bell became so famous that various people tried developing modified versions of it, Sittman and Pitt developed it for the first time, churning out a five reel 50 card face slot machine. It had a number of poker combinations to give the payout, the modern day slot machines are said to be the modifications of this five reeled slot machine.

Money-honey developed in 1963, was the first fully electromechanical slot machine, created by Bally manufacturing. It could pay up to 500 coins without the need of an attendant. In 1976, video slots were introduced and to this day they are famous in the clubs and casinos of Las Vegas. They had various modifications in the original slot machines to make the game more cheat proof and that is why they gained popularity in a very short time.

Technological advances in the development of slot machines have pushed the developers in devising more pay lines for one game, modern day machines have more play lines varying from 9 to 50, while some have totally abandoned pay lines and use more than 243 ways of winning.

Slot machines are the major game of casinos these days both in terms of their number and the revenue they generate. As slots games are now available online as well, the problem of space is also no more and the game has become more lucrative now. More and more themes, bonus games and coin sizes are also being introduced to increase the interest of the players in the game.

Movie based themes are being incorporated in the slot machines to make them more attractive and exciting. Software developers are expected to introduce diverse movie based machines in which the concept of the movie is depicted so as to keep the players interest intact.