When certain symbols appear in a winning combination a special feature of the particular game theme is activated, which is a Bonus. The player can choose from several items shown on a screen. After choosing items a number of credits is revealed and awarded. Some bonuses use a mechanical device, such as a spinning wheel. To display the amount won it works 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. The hopper is a mechanical device that rotates coins into the coin tray when a player collects credits. When a certain preset coin capacity is reached, a coin diverter automatically redirects excess coins into a drop bucket, or drop box.
A visual display of the amount of money or credits on the machine is called Credit meter.
Drop bucket or Drop box is used for diverting exess coins from the hopper. 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. There is a scheduled basis on which the contents of drop buckets and drop boxes are collected and counted.
Electronic Gaming Machine is called EGM.
The term Hand pay means a payout made by a slot attendant or cage, rather than the slot machine. A hand pay occurs when the amount of the payout exceeds the maximum amount that was preset by the slot machine's operator. The maximum amount is set at the level where the operator must begin to deduct taxes. A hand pay could also be necessary as a result of a short pay.
Hopper fill is a document used for recording 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. Playing Stand Up or Upright slot machines you won't be able to sit.
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. Classic spinning reel machines usually have up to nine pay lines, while video slot machines may have as many as one hundred.
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.
A partial payout made by a slot machine, which is less than the amount due to the player is called Short pay. 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.

Know what you are playing.
Always make sure that you insert the correct amount of coins into a machine. Always cash out your credits before leaving a machine.
Slots shouldn't be a stress for you, just enjoy. You can increase your bets only when you are winning, and decrease your bets when you are losing.

United States
In the United States the availability of slot machines is regulated by governments. There are a lot of states that 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. 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 slot machines at three horse tracks. State lottery commission regulates them.

Casinos: Native American
Slot machines are forbidden in Native American casinos located in reservations. It is permitted when the tribe first reaches a pact with the state in which it is located. 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. There are different classifications of them. Some states have restrictions on the type of slot machines that can be used in a casino or other gaming area. The operation of "Class III" (or "traditional") slot machines is fulfilled from a centralized computer system. The possibility that a player wing any payout is the same with every play. There are a lot of Class III slots in Nevada or Atlantic City. They are sometimes referred to as "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. There is a fee for each Class III game that the casino has to pay to the state. Class II games are not so tightly regulated by the state.

Characteristics Of Class II Games
The player is playing against other players. They are competing for a common prize. There is always someone who wins. The game continues until there is a winner. A given set has 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. All players play from the same set of numbers as the numbers are announced.

Characteristics Of Class III Games
The house plays against the player. There is no connection between the previous and the next games. The outcome of any game is unpredictable.

Slot Clubs
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. The requirement of such clubs is the usage of cards for the slot machines. Comps or "cash back" from these clubs can make significant differences in the maximum theoretical returns.

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 five of them in most cases. There are laws regulating the use of gaming machines in Australia which are created by State governments.
Gaming machines are found in casinos as well as pubs and clubs in some states. The first Australian state to legalize this style of gambling was New South Wales. The year of 1956 was the year of their legalization 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. Pubs, clubs, arcades, and some take-away food shops have fruit machines. These machines commonly have 3, but can be found with 4 or 6 reels with around 16 or 24 fruit symbols printed around them. These reels should be spun. Winnings are paid from the machine if certain combinations of fruit appear. These are very similar to slot machines seen in casinos and elsewhere around the world. But there are some extra features. There exists a strict jackpot limit. The UK fruit machines have some features. A player is given the opportunity to hold one or more reels before spinning. It sometimes increases the chance of winning. A finite number nudges following a spin can be also given to a player. A single-step rotation of a reel of the player's choice is a called a nudge.
The maximum payout for an individual game is different depending on the type and the location of the machine. There are "club machines" in private members' clubs. They charge more per game and have higher jackpots.
The manner of operation of these machines is different 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. They originate from 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 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.