As with any game of pure chance, there is no real effective strategic system for winning at slots. Never believe if somebody says that he has an incredible winning strategy. The slots are casual, there is nothing that can influence the outcome of the game. The slots don’t have memory, that’s why it is not wise to try to outwit them. But there are some tips, which you can use as a basic strategy. Different slots have different payouts. So play slots with the higher payout. You want to find anything above 95%. Similar to other casino games, it is crucial to know the odds and probabilities of the machine you're playing. There is a payout table for each slot, so make sure you read it before inserting coins. Before playing decide how much you can spend this day. Stop playing when you reach this losing limit. When playing remember that you can win as well as lose. Don’t think that machine will feel guilty if you insert a lot of coins and get nothing back. If you think that the machine you are playing will hardly pay anything out you’d better stop playing it. When things are going your way and you're on a lucky streak, take advantage of it and bet more. Don’t make high bets if you are not very lucky with this very slot machine. Choose a slot according to your bankroll. Play dollar machines if you don’t have much money. Don't forget to cash out the credits you've accumulated. Sounds obvious, but a lot of people forget! Play the slots you know well.

You must know exactly the game you are playing.
Only the correct amount of money should be inserted into a machine. Before leaving a machine cash out your credits.
Just have fun. Slots should be fun, not stressful. Use money management. Increase your bets when you are winning, and decrease your bets when you are losing.

Slot machines have a vivid and diverse history. Throughout the years, designs and implementation of slot machines went from mechanical to electronic, and from electronic to digital, then from digital to purely software, but the principles are still the same: the slot machine has reels which spin and, if the pre-defined winning combination plays out, you win. The player inserts coins in the machine and then wins or loses according to the outcome of the game.
In fact all slot machines are the same. They only differ in some peculiarities: odds, payouts, payout percentage and symbols. There are so many varying designs around the classic slot machine that everyone could probably find their own ultimate preferred flavour.
Two most distinct types of slot machines are single line and multiline slots. In single line slots, the machine has just one line of reels, usually with 4 or 5 wheels, while in multiline there are a number of reel lines. Multi line slots are more difficult to understand because you win according to the winning combinations on the paylines, which can be formed in many ways. It can happen that you win nothing during the game or that you win big in a short while. Paylines can be different. They can be vertical, diagonal, zigzags and what not.
Another interesting variation of the slot machine is a jackpot. In jackpot games, the slot machines accumulate a fraction of every wagered bet into a virtual pot. As the players wager, the jackpot grows and grows, sometimes crossing hundreds of thousands of dollars. There is only one winning combination that can bring the gambler the jackpot.
Since slot machines appeared they have been played with coins. Online casino slot machines are no exception to that rule, even though bets might differ slightly. Like regular slots they have betting limits, which can be even lower than in real casinos. Unlike the table games, slot machines don't involve any decision on the player's part and so aren't threatened by game management systems because of their fixed odds; the bet limits are more of a traditional thing than anything else.
Online slot machines also have RNG, which exclude any possibility to cheat. This methodic allows very fair and precise balancing without actually hurting neither the players' interests nor the casino revenue.

United States
In the United States the availability of slot machines is regulated by governments. To regulate the possession and use of slot machines many states have established gaming control boards. Nevada is the only state that has no significant restrictions against slot machines. In New Jersey only hotel casinos operated in Atlantic City are allowed to have slot machines. Only licensed riverboats or permanently-anchored barges are allowed to have slot machines in some states. Delaware allows to have slot machines only three horse tracks. They are regulated by the state lottery commission.

Native American Casinos
Native American casinos located in reservations are not permitted to have slot machines. When the tribe first reaches a pact with the state in which it is located it gets the permission to have them. A pact entitles the state to receive a fraction of the gross revenue from slot machines.

Classes Of Slot Machines
Slot machines aren't governed by any federal law. Their classifications may vary from state to state. There are restrictions on the type of slot machines that can be used in a casino or other gaming area in some states. "Class III" (or "traditional") slot machines operate independently from a centralized computer system. The chance of winning any payout is the same with every play. Class III slots are most often seen in Nevada or Atlantic City. They are sometimes referred to as "Vegas-style slots".
There are "Class II" slot machines ("video lottery terminals" or "VLTs") which are connected to a centralized computer system. The outcome of each wager is determined by it. The chance of winning a series of limited prizes is equal for each machine. There is a fee for each Class III game that the casino has to pay to the state. The regulations for Class II games are not so tight.

Characteristics Of Class II Games
The players are playing against each other. There is a common prize for which they are competing. There is always someone who wins. The game is continued until someone wins. In a given set there is a certain number of wins and losses. Once a certain combination has occurred it cannot occur again until a new batch is initiated. There is a dependence of between the games. The player must be an active participant. The announced numbers belong to the same set of numbers for all players.

Class III Game Characteristics
The opponents are the player and the house. There is no connection between the previous and the next games. The outcome of any game is unpredictable.

Clubs Of Slot Players
There is free memberships in "slot clubs" in many casinos of America. They offer to return a small fraction of the amount of money that is bet in the form of comps. These clubs require that players use cards to insert into the slot machines. Comps or "cash back" allows to make the differences in the maximum theoretical returns significant.

Australia
Queen of the Nile is a poker machine that is very popular in Australia. Slot machines in Australia are officially termed Gaming Machines. Australian-style gaming machines frequently use video displays to simulate physical reels. There are usually five of them. State governments regulate the use of gaming machines in Australia.
Not only casinos but also pubs and clubs in some states have Gaming machines. New South Wales legalized this style of gambling first. In 1956 they were made legal in all registered clubs in the state.
In Western Australia only particular forms of gaming machine are used.

Slots In The United Kingdom
The terms fruit machines, one-armed bandits and AWP are used to denote slot machines in Britain. There are fruit machines in pubs, clubs, arcades, and some take-away food shops. There can be 3, 4 or 6 reels with around 16 or 24 fruit symbols printed around them. These reels should be spun. If certain combinations of fruit appear, winnings are paid from the machine. Slot machines seen in casinos and elsewhere around the world are similar to these machines. These games have lots of extra features. There exists a strict jackpot limit. There are some features of fruit machines in the UK. A player may be given the opportunity to hold one or more reels before spinning. The chance of winning can sometimes be increased. A player may also be given a finite number nudges following a spin. A nudge is a single-step rotation of a reel of the player's choice.
The type and the location of the machine influences the maximum payout for an individual game. There are "club machines" in private members' clubs. Their jackpots are higher and they are allowed to charge more per game.
These machines and American slot machines operate differently. The probability of getting the jackpot in each game is independent of any other game.
The AWP fruit machine is played in Europe and in countries such as the Czech Republic, Russia, and Ukraine.

Slots In Japan
Pachisuro are Japanese slot machines. They are a descendant of the traditional Japanese pachinko game. Slot machines have appeared recently. Pachinko parlors and the adult sections of amusement arcades, known as game centers have them.
IC chips regulate the machines. They have six different levels changing the odds of a "777". There are certain rules and regulations in spite of the many varieties of the machines.

Have you ever met a man who has managed to cheat slots?
It is impossible to cheat the slot machine, but to improve the payout is possible. It was proved by a gambler whose name was Tommy Glenn Carmichael.
A 53-years Tommy all his life tried to invent some kind of devices to cheat the slot machine. His first device was a kind of a top-button joint. By the way, for this device he was sent to prison. Upon his release, he continued to work on the problem and to devise a better way to cheat the new slot machines. For example, he invented a tool called a slider made from guitar wire that he used to insert into the machine and trip a switch, which released coins from the hopper.
Later the slot machines were not any longer mechanical, they were computerized and as a result there appeared a need for a new device. Tommy found a manufacture who showed him the inside of a slot machine. From that experience, he learned what he needed to know to beat it. Carmichael invented what he called a “light wand. ” The wand, built with a camera battery and a bright miniature light, was used to shine into the slot machine and blind a sensor, causing the hopper to pay out coins. Other gamblers liked his invention and he had a lot of customers, which allowed him to earn up to ,000 a day. Now he could afford the most expensive cars and several houses.
But as known good things can’t last forever. For Carmichael, they ended in front of a slot machine at Circus, where he was caught with the light wand when he tried to run from security. He was fined, but soon came back to the same business. By this time, authorities had tapped his phone and recorded conversations with other cheats who used his device. Three years’ probation and expropriation was the punishment. He has been banned from entering any casino.