A special feature of the particular game theme activated when certain symbols appear in a winning combination is Bonus. The player can choose from several items shown on a screen. A number of credits is revealed and awarded to the player when items are chosen. A mechanical device, such as a spinning wheel is used by some bonuses. It is used in conjunction with the bonus for displaying the amount won.
There is a light on top of the slot machine called Candle. It alerts the operator that change is needed, hand pay is requested or there is a potential problem with the machine.
Slot machines in a circle or oval formation are usually called Carousel.
Coin hopper is a container where the coins that are immediately available for payouts are held. It is used to rotate coins into the coin tray when a player collects credits. There is a coin diverter used for redirecting excess coins into a drop bucket, or drop box when a certain preset coin capacity is reached.
A visual display of the amount of money or credits on the machine is called Credit meter.
Drop bucket or Drop box is a container located in a slot machine's base where excess coins are diverted from the hopper. Typically, a drop bucket is used for low denomination slot machines. High denomination slot machines use a drop box. There is a hinged lid with one or more locks in a drop box and there ais no such lid in a drop bucket. The casino collects and counts the contents of drop buckets and drop boxes.
Electronic Gaming Machine is called EGM.
To denote a payout made by a slot attendant or cage, rather than the slot machine the term Hand pay is used. When the amount of the payout exceeds the maximum amount that was preset by the slot machine's operator a hand pay occurs. At the level where the operator must begin to deduct taxes the maximum amount is set. A hand pay can also be a result of a short pay.
There is Hopper fill used to record the replenishments of the coin in the coin hopper after it becomes depleted as a result of making payouts to players. The slip indicates the amount of coins placed into the hoppers, the signatures of the employees involved in the transaction, the slot machine number and the location and the date.
A stool is included into Low Level or Slant Top slot machines, so you can sit and play. You will have to stand while playing Stand Up or Upright slot machines.
Optimal play is a payback percentage based on a gambler using the optimal strategy in a skill-based slot machine game.
A straight or zigzagged line that crosses through one symbol on each reel, along which a winning combination is evaluated is called Payline. Up to nine pay lines are contained by classic spinning reel machines and video slot machines contain up to a hundred ones.
The process of dramatizing a win by playing sounds while the meters count up to the amount that has been won is Rollup.
Short pay refers to a partial payout made by a slot machine, which is less than the amount due to the player. It can happen if the coin hopper has been depleted as a result of making earlier payouts to players. In this case the remaining amount will be paid as a hand pay or an attendant will come and re-fill the machine.
Theoretical Hold Worksheet is a document provided by the manufacturer for all slot machines. The theoretical percentage that the slot machine should hold based on adequate levels of coin-in is idicated in it. The reel strip settings, number of coins that may be played, the payout schedule, the number of reels and other information is indicated in the worksheet.
Weight count is an American term, referring to the dollar amount of coins or tokens removed from a slot machine's drop bucket or drop box and counted by the casino's hard count team through the use of a weigh scale.

There are at least two types of slot players.
Persistent player.
These players are sure that the machine is already ready to pay out, they just have to wait for a little. Just a second and the coins will be flying all over the casino!
The player will play until the machine pays out. He must have found a machine that haven’t paid for a long period of time or he has inserted to many coins and has got nothing. They know the next big win, or any win is due to pay out. The rush is that if they leave after depositing so much money in the machine it will erupt and the payouts will be often and large. Makes sense if you have lost 0. 00 and have yet to win. The machine will pay any way.
Many years ago players have their own way of determining whether the machine has not paid out for a long period of time. They touch the coins to see whether they were cold or hot. If the coins where hot then the slot machine had not paid out in a while and to the chaser this was good as the machine was do. But in reality any machine has numerous lights which heat the coins.
The chaser.
The player thinks that the machine he is going to play is not a machine that never pays. There is some kind of comfort and trust between the slot machine and the player.

Slot machines have a vivid and diverse history. They came through a number of changes and improvement. But the objective and the principle of the game always remain the same. The player inserts coins in the machine and then wins or loses according to the outcome of the game.
Basically, slot machines are all the same. They have different odds (and of course payouts), different payoffs, different symbols and different exterior arrangement, but there's little difference under the hood. There are so many variatisn of slot machines that everybody can find something to his liking.
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. There are machines with paylines; that is, vertical lines along which a winning combination must occur, but some don’t have them, as the winning combination may come in diagonals, zigzags, strange curves and in other ways and fashions.
Jackpot is also a feature peculiar not for all slots. If the slot machine has a jackpot it means that a certain amount of each additional bet is added to the jackpot. As the players wager, the jackpot grows and grows, sometimes crossing hundreds of thousands of dollars. A certain winning combination hits the jackpot, and the lucky gambler collects everything that the ones before him left behind.
Slot machines are historically played with coins. The new invention is a slot machine online, which doesn’t differ greatly from regular slot machines. 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.
Software slot machines (as well as the digital ones) are equipped with a random number generator which is what actually plays the game. That’s why slots are as fair as it is only possible.

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

Casinos: Native American
There are no slot machines in Native American casinos located in reservations. When the tribe first reaches a pact with the state in which it is located it gets the permission to have them. The state is entitled to receive a fraction of the gross revenue from slot machines by the pact.

Classes Of Slot Machines
No federal law is created to govern slot machines. Each state has its own classification. 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. Every play has equal chances of winning any payout. Class III slots are most often seen in Nevada or Atlantic City. "Vegas-style slots" is another name for them.
A centralized computer system is connected to "Class II" slot machines ("video lottery terminals" or "VLTs"). It determines the outcome of each wager. Each machine has an equal chance of winning a series of limited prizes. There is a fee for each Class III game that the casino has to pay to the state. The state doesn't regulate Class II games so tightly.

Class II Game Characteristics
The player is playing not against the casino but against other players. There is a common prize for which they are competing. Each game has a winner. The game continues until there is a winner. 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. One game is dependent on previous games. The player is an active participant of the game. The same set of numbers is played by all players.

Characteristics Of Class III Games
The house plays against the player. There is no connection between the previous and the next games. Any possible outcome can occur in any game.

Clubs Of Slot Players
There is free memberships in "slot clubs" in many casinos of America. A small fraction of the amount of money that is bet is returned in the form of comps. The cards are used to insert into the slot machines in these clubs. Comps or "cash back" allows to make the differences in the maximum theoretical returns significant.

Slots In Australia
One of the most popular Australian poker machine games is Queen of the Nile. Australian slot machines are called Gaming Machines. Australian-style gaming machines frequently use video displays to simulate physical reels. There are usually five of them. The use of gaming machines in Australia is regulated by the laws.
Gaming machines are found in casinos as well as pubs and clubs in some states. New South Wales was the first state to legalize this style of gambling. In 1956 they were made legal in all registered clubs in the state.
Only particular forms of gaming machine are permitted to be used in Western Australia.

Slots In The United Kingdom
In Britain slot machines are known as fruit machines, one-armed bandits and AWP. 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 are spun. The machine pays winnings if certain combinations of fruit appear. These machines and slot machines seen in casinos and elsewhere around the world are very similar. But there are some extra features. However, the jackpots from these fruit machines are strictly limited. 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. This can sometimes increase the chance of winning. A finite number nudges following a spin is given to a player. A single-step rotation of a reel of the player's choice is a called a nudge.
The type and the location of the machine influences the maximum payout for an individual game. Private members' clubs have "club machines". Their jackpots are higher and they are allowed to charge more per game.
These machines differ from American slot machines. The jackpot can be won in each game independently.
The AWP fruit machine is played in Europe and in countries such as the Czech Republic, Russia, and Ukraine.

Japanese Slots
Pachisuro is the name for Japanese slot machines. Their ancestor is the traditional Japanese pachinko game. Slot machines are a fairly new phenomenon. Pachinko parlors and the adult sections of amusement arcades, known as game centers have them.
IC chips are used to regulate the machines. They have six different levels changing the odds of a "777". Despite the many varieties of the machines, there are certain rules and regulations.

Have you ever met a man who has managed to cheat slots?
Slot machines pay on a random basis, but what if you could improve the payout a little? Would you do it? Tommy Glenn Carmichael would and did.
Tommy is now 53 and he can be said to have spent all his life inventing different devices to cheat slot machines. He was caught with one, called a top-bottom joint, and sentenced to prison. Upon his release, he continued to work on the problem and to devise a better way to cheat the new slot machines. His next invention was a slider, a guitar wire. He inserted it into the machine, which released coins form the hopper.
Later, as slot machines became computer based, he had to invent a new tool. He fooled a manufacturer into believing he was a customer and showing him the inside of a slot machine. It was enough to learn everything that he wanted. 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. He sold these wands and could earn up to ,000 a day. With all this money he bought expensive cars, houses and what not.
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.