The history of slots dates back to machines known as "nickel-in-the-slot," but they were very different from today's slot machines. The earliest real slot machines were designed by Charles Fey. He manufactured the first three-reel slot machine with bells in San Francisco.
The machine he designed, the "Liberty Bell" is the earliest slot machine that resembles today's slot machines. With three reels, each with 20 symbols, the "Liberty Bell" was the forerunner of today's five reel computerized games.
During the 1930's, slot machines became popular across the United States. In the late 1940's, the Flamingo Hilton in Las Vegas introduced slots as a way to entertain the wives and girlfriends of the casino's high rollers. Slot machines quickly started making their own profits, and by the 1980's, slots accounted for almost half of the money earned by casinos.
Slots gained popularity because they don't require any special skill. Players only need to pull a lever and win or lose. When they win, there's a payout table listed on the machine, and players only need to collect their winnings. In addition, slots are fast-paced, but not dependant on a dealer or other players.
Slots have developed into many different types of machines. Some machines have 3 reels, and some have 5. Many slot machines have a theme. Slot machines used to all have a lever on the right side of the machine, leading them to be called the one-armed-bandit. Today's machines are often fully electronic, meaning that even if they have a lever, the lever doesn't directly move the reels. Slot Professionals players will enjoy slots prefer push-button slots or online slots games such as the ones that can be found at Slots 2000. Online slots sites are always inventing new ways of making slots more interesting.
Slot machines can be either "straight slots" or progressive. Progressive slots allow you to build an increasing jackpot, meaning that top wins on progressive slots are often much higher than Progressive Jackpots on straight slots. Casinos often have a wide variety of slot machines, ranging from single line machines with three reels to multi-line machines with five reels, and a networked progressive jackpot. Slots used to commonly be fruit-themed, with three cherries being a popular winning combination. New slots have many different themes, from television shows to comic strips. One recently designed slot machine simulates the television show "The Apprentice."
Slots can vary in denomination too. Machines are typically played for as little as 5 cents, and as much as $5. Some casinos have special high-rollers machines, where players can play for as much as $100 at a time.
Slot machines with multiple lines and multiple coins often only pay jackpots to players who have played the maximum number of coins. Old fashioned slot machines use coins, and when players win a regular win, the coins come out of the machine, but if there is a big win, one of the casino employees will pay the winner. Newer slot machines use cards, and the player sees the credits on a digital display on the machine. In addition, many people prefer to play online slots, where the money is all placed in an account, and players can see their credits and winnings on the screen, from the comfort of their own home.