A special feature of the particular game theme activated when certain symbols appear in a winning combination is Bonus. Several items on the screen are presented to the player 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. It is used in conjunction with the bonus for displaying the amount won.
Candle is a light on top of the slot machine. It flashes to alert the operator that change is needed, hand pay is requested or a potential problem with the machine.
The term carousel is used to denote a grouping of slot machines, usually in a circle or oval formation.
There is a container where the coins that are immediately available for payouts are held called Coin hopper. It is used to rotate coins into the coin tray when a player collects credits. A coin diverter automatically redirects 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.
Drop bucket or Drop box is a container located in a slot machine's base where excess coins are diverted from the hopper. It is generally used in low denomination slot machines. As for high denomination slot machines they use a drop box. A drop box contains a hinged lid with one or more locks whereas a drop bucket doesn't contain a lid. The casino collects and counts the contents of drop buckets and drop boxes.
EGM is a short-hand for 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. At the level where the operator must begin to deduct taxes the maximum amount is set. A hand pay could also be necessary as 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 are shown with the slip.
Low Level or Slant Top slot machines are equipped with a stool for you to sit and play. Playing Stand Up or Upright slot machines you won't be able to sit.
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.
A straight or zigzagged line that crosses through one symbol on each reel, along which a winning combination is evaluated is called Payline. There are up to nine pay lines in classic spinning reel machines while there can be one hundred pay lines in video slot machines.
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. If the coin hopper has been depleted as a result of making earlier payouts to players the short pay happens. An attendant will come and re-fill the machine or the remaining amount will be paid as a hand pay.
A document provided by the manufacturer for all slot machines is called Theoretical Hold Worksheet. It indicates the theoretical percentage that the slot machine should hold based on adequate levels of coin-in. The worksheet also indicates the reel strip settings, number of coins that may be played, the payout schedule, the number of reels and other information.
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.

Here is the list of the most amusing myths concerning slots.
You can spot a winning slot machine.
The only way one can say that theslot machine is a winning one is only to catch this moment, when the machine pays out. RNG is the main element of every slot machine and one never knows what combination it will form.
Casinos place loose slots near the cashier, aisle ways, etc.
In reality it is not to casino’s advantage to place loose slots at one and the same place, because in this case gamblers would play only these slots. The slots are mixed and nobody can say for sure whether this slot is a loose one or not.
Count the number of symbols on the reels to determine your odds.
It is a rude mistake. RNG decides when the machine will stop and there are thousands of combination available on a 3 reel slot machine.
Casinos can tighten or loosen slot machines from the back office.
In order to change how a slot willpay out is by changing the computer chip. No casino can just flip a switch.
A slot machine that has not been paying is due to hit.
It is not so. With every game the chances of winning are the same.
Pulling the slot machine handle produces more wins than pressing the spin button and visa versa.
Again false. It makes no difference, as the computer only uses these as mechanisms to start the game. Only the computer determines a win or a loss and it has already determined if you are a winner or loser even before the first reel stops spinning.
Playing with hot coins improves your chances.
It is false. Nothing can affect the outcome, the machine doesn’t care and doesn’t know whether your coins are cold or hot.
Casinos set slot machines to payback more on the weekends.
Wrong again. Your odds of winning are the same no matter if it's 4:00pm Monday, 8:00pm Saturday or 3:00am Wednesday. Casinos can not and do not do this.

United States
In the United States the availability of slot machines is regulated by governments. Many states have established gaming control boards for regulating the possession and use of slot machines. There is only one state that has no significant restrictions against slot machines - Nevada. In New Jersey only hotel casinos operated in Atlantic City are allowed to have slot machines. Several states allow slot machines only on licensed riverboats or permanently-anchored barges. In Delaware there are slot machines only at three horse tracks. State lottery commission exists for their regulating.

Native American Casinos
Native American casinos located in reservations are not permitted to have slot machines. But when the tribe first reaches a pact with the state in which it is located it is permitted. 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. There are different classifications of them. 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. Nevada or Atlantic City have more Class III slots than any other state. The term "Vegas-style slots" is iften used to denote them.
"Class II" slot machines ("video lottery terminals" or "VLTs") are connected to a centralized computer system. It determines the outcome of each wager. Each machine has an equal chance of winning a series of limited prizes. A fee for each Class III game is paid by the casino to the state. Class II games are not so tightly regulated by the state.

Characteristics Of Class II Games
The players are playing against each other. They are competing for a common prize. Each game has a winner. Only when there is a winner the game stops. There is a certain number of wins and losses in a given set of wins. 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 is an active participant of the game. All players play from the same set of numbers as the numbers are announced.

Class III Game Characteristics
The opponents are the player and the house. There is no connection between the previous and the next games. There can be any possible outcome in any game.

Slot Clubs
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. The differences in the maximum theoretical returns can be significant thanks to comps or "cash back" from these clubs.

Slots In Australia
One of the most popular Australian poker machine games is Queen of the Nile. Slot machines in Australia are officially termed Gaming Machines. Australian-style gaming machines have video displays for stimulating physical reels. There are five of them in most cases. The laws regulating the use of gaming machines in Australia are a matter for State governments.
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 became 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
Fruit machines, one-armed bandits and AWP are the names for slot machines in Britain. Fruit machines are commonly found in pubs, clubs, arcades, and some take-away food shops. 3, 4 or 6 reels with around 16 or 24 fruit symbols printed around them can be found on the machines. These reels are spun. Winnings are paid from the machine if certain combinations of fruit appear. These machines and slot machines seen in casinos and elsewhere around the world are very similar. But some extra features can be found. There exists a strict jackpot limit. The UK fruit machines have some features. There is an opportunity for a player 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 nudge is 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 have "club machines". They have higher jackpots and are allowed to charge more per game.
The manner of operation of these machines is different from American slot machines. 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
Japanese slot machines are known as pachisuro. They originate from 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 are used to 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.