A special feature of the particular game theme activated when certain symbols appear in a winning combination is Bonus. The player is presented with several items on a screen from which to choose. A number of credits is revealed and awarded as the player chooses items. A mechanical device, such as a spinning wheel is used by some bonuses. The amount won is displayed with the help of it in conjunction with the bonus.
A light on top of the slot machine is 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.
A container where the coins that are immediately available for payouts are held is coin hopper. When a player collects credits this mechanical device rotates coins into the coin tray. 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.
To display the amount of money or credits on the machine Credit meter is used.
A a container located in a slot machine's base where excess coins are diverted from the hopper is Drop bucket or Drop box. Typically low denomination slot machines use a drop bucket. A drop box can be found in high denomination slot machines. The difference between a drop box and a drop bucket is a hinged lid with one or more locks. The casino collects and counts the contents of drop buckets and drop boxes.
EMG is Electronic Gaming Machine.
A payout made by a slot attendant or cage, rather than the slot machine is Hand pay. When the amount of the payout exceeds the maximum amount that was preset by the slot machine's operator a hand pay occurs. The maximum amount is set at the level where the operator must begin to deduct taxes. 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.
Playing Low Level or Slant Top slot machines you can sit as they have a stool. You can only stand playing Stand Up or Upright slot machines.
The term Optimal play is used to denote a payback percentage based on a gambler using the optimal strategy in a skill-based slot machine game.
The term Payline is used to denote a straight or zigzagged line that crosses through one symbol on each reel, along which a winning combination is evaluated. There are up to nine pay lines in classic spinning reel machines while there can be one hundred pay lines in video slot machines.
While the meters count up to the amount that has been won the process of dramatizing a win by playing sounds happens which is called 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. An attendant will come and re-fill the machine or the remaining amount will be paid as a hand pay.
The manufacturer for all slot machines provide them with a document called Theoretical Hold Worksheet. It indicates the theoretical percentage that the slot machine should hold based on adequate levels of coin-in. 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.
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 is called Weight count.

There exist at least two types of slot players.
The first type is a persistent player.
These players are sure that the machine is already ready to pay out, they just have to wait for a little. The machine can begin paying in any second.
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. They can’t leave the machine because as soon as they do it will burst forth and pay out large sums. Makes sense if you have lost 0. 00 and have yet to win. The machine will pay any way.
In the old days when a payout occurred players would feel the coins to see if they were hot or cold. 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.
Chaser is the next type of slot players.
The player thinks that the machine he is going to play is not a machine that never pays. Players feel more comfortable and confident because they have been reinforced with a win and gain trust in the machine. 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. Basically, you just put in the coins and wait to find out whether you won or not.
In fact all slot machines are the same. They only differ in some peculiarities: odds, payouts, payout percentage and symbols. 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. As it can be understood from its name single line slots have only one line with 4 or 5 wheels. But multi line slots can have up to 25 lines. Multi line slots are a little bit more complicated because winning combinations may play out across a number of lines; when you win, the machine will draw you how the symbols combine together and calculate the win automatically. Sometimes you don't win anything at all, and sometimes multiple combinations award you with relatively big winning money. 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. In jackpot games, the slot machines accumulate a fraction of every wagered bet into a virtual pot. So the jackpot becomes bigger and bigger with every bet. Jackpots can reach several hundreds of thousands dollars. There is only one winning combination that can bring the gambler the jackpot.
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. Slots are the easiest casino games. They don’t require any decision on the player’s part.
Software slot machines (as well as the digital ones) are equipped with a random number generator which is what actually plays the game. This methodic allows very fair and precise balancing without actually hurting neither the players' interests nor the casino revenue.

The US
In the United States the availability of slot machines is highly regulated by state governments. Many states have established gaming control boards to regulate the possession and use of slot machines. Nevada is the only state that has no significant restrictions against slot machines. Slot machines are allowed only in hotel casinos operated in Atlantic City in New Jersey. 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.

Native American Casinos
Slot machines are forbidden 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. According to the pact a fraction of the gross revenue from slot machines is received by the state.

Classes Of Slots
No federal law governs slot machines. 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 possibility that a player wing any payout is the same with every play. Class III slots are most often seen in Nevada or Atlantic City. They are also called "Vegas-style slots".
"Class II" slot machines ("video lottery terminals" or "VLTs") 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. The casino pays a fee to the state for each Class III game. The regulations for Class II games are not so tight.

Class II Game Characteristics
The player is playing against other players. The prize is common. One player always wins the game. The game continues until there is a winner. A given set has a certain number of wins and losses. The combimation can occur again only after a new batch is initiated. The games are dependant on each other. The player must be an active participant. All players play from the same set of numbers as the numbers are announced.

Class III Game Characteristics
The player is playing against the house. The previous games don't influence the following ones. There can be any possible outcome 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. 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.

Slots In Australia
Queen of the Nile is a poker machine that is very popular in Australia. Gaming Machines is an official name for Australian slot 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 legalized this style of gambling first. In 1956 they were made legal in all registered clubs in the state.
Western Australia only permits the use of particular forms of gaming machine.

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 are spun. Winnings are paid from the machine if certain combinations of fruit appear. There is similarity between these machines and slot machines seen in casinos and elsewhere around the world. But there are some extra features. The jackpots from these machines are limited. Fruit machines in the UK also almost universally have the following features. There is an opportunity for a player to hold one or more reels before spinning. The chance of winning is sometimes increased. A player may also be given a finite number nudges following a spin. The term nudge is used to denote a single-step rotation of a reel of the player's choice.
The maximum payout for an individual game is influenced by the type and the location of the machine. Private members' clubs are allowed "club machines". Their jackpots are higher and they are allowed to charge more per game.
These machines also operate in a different manner to American slot machines. The jackpot can be won in each game independently.
The AWP fruit machine is popular across Europe and in countries such as the Czech Republic, Russia, and Ukraine.

Japan
The term pachisuro is used to denote Japanese slot machines. They originate from the traditional Japanese pachinko game. Slot machines are 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. There are six different levels changing the odds of a "777". There is a variety of slot machines but there exist rules and regulations for all of them.

All slots work according to one and the same rule. You put coins or money in the slot machine and then pull the handle. According to the main slot classification there are two types of slots. They are straight slots and progressive slots. The main feature, which distinguishes straight slots from other types is that you get paid according to the payout table, which is shown on the slot machine. There are four other types inside of the straight slot group: multiplier, bonus multiplier, multiple payline and buy-a-pay slots. The bet amount determines the sum of the payout in multiplier slots. The Bonus Multiplier game offers a bonus if you make maximum bets. The feature of multiple payline slots is that the number of active payline is dependent on the number of coins being bet. The Buy-a-Pay slots are profitable only if you place maximum bets. Progressive slots are characterized by the big jackpot, which progressively gets larger and larger, as every coin is put in. The jackpot total is posted above the machine and can grow to enormous sums of money.