Bonus is a special feature of the particular game theme, which is activated when certain symbols appear in a winning combination. The player can choose from several items shown on a screen. A number of credits is revealed and awarded as the player chooses items. There are bonuses that use a mechanical device, such as a spinning wheel. It is used in conjunction with the bonus for displaying the amount won.
A light on top of the slot machine is Candle. When change is needed, hand pay is requested or a potential problem with the machine appears it flashes.
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. When a certain preset coin capacity is reached, a coin diverter automatically redirects excess coins into a drop bucket, or drop box.
Credit meter is used for displaying the amount of money or credits on the machine.
Drop bucket or Drop box is a container located in a slot machine's base where excess coins are diverted from the hopper. Typically low denomination slot machines use a drop bucket. High denomination slot machines use a drop box. The difference between a drop box and a drop bucket is a hinged lid with one or more locks. The contents of drop buckets and drop boxes are collected and counted by the casino on a scheduled basis.
Electronic Gaming Machine is called EGM.
A payout made by a slot attendant or cage, rather than the slot machine is Hand pay. A hand pay occurs when the amount of the payout is more than the maximum amount that was preset by the slot machine's operator. 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.
Hopper fill slip is a document used to record the replenishments of the coin in the coin hopper after it becomes depleted as a result of making payouts to players. There is the slip that 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.
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 means 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.
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.
The term Short pay is used to mean a partial payout made by a slot machine, which is less than the amount due to the player is called Short pay. This occurs 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.
The term Theoretical Hold Worksheet. Is used to denote a document provided by the manufacturer for all slot machines. 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.

Here is the list of the most amusing myths concerning slots.
You can spot a winning slot machine.
The only way you'll spot a winning slot machine is when the bells are ringing and the money is dropping. 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.
Absolutely false. The RNG assures this. You have an equal chance of winning on a losing machine as you do on a machine that just paid out the jackpot.
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.
Once again, the computer determines a win or loss and the temperature of the machine or moneyirrelevant. Although it's funny that people still burn their fingers with lighters believing this works.
Casinos set slot machines to payback more on the weekends.
One more rude mistake. The chances and odds are always the same. It doesn’t matter when you play.

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. There is only one state that has no significant restrictions against slot machines - Nevada. Slot machines are allowed only in hotel casinos operated in Atlantic City in New Jersey. In some states slot machines are allowed only on licensed riverboats or permanently-anchored barges. Delaware allows to have slot machines only three horse tracks. State lottery commission exists for their regulating.

Casinos: Native American
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. Typically, a pact entitles the state to receive a fraction of the gross revenue from slot machines.

Classes Of Slots
No federal law governs 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. The operation of "Class III" (or "traditional") slot machines is fulfilled from a centralized computer system. Every play has equal chances of winning any payout. You can find Class III slots in Nevada or Atlantic City more frequently. "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. 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 state doesn't regulate Class II games so tightly.

Class II Game Characteristics
The player is playing against other players. They are competing for a common prize. There is necessarily a winner in each game. The game stops when the winner appears. 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 depend on one another. The player must be an active participant. The announced numbers belong to the same set of numbers for all players.

Characteristics Of Class III Games
The house plays against the player. The previous games don't influence the following ones. There can be any possible outcome in any game.

Slot Clubs
Free memberships in "slot clubs" is offered by many American casinos. A small fraction of the amount of money that is bet is returned in the form of comps. The requirement of such clubs is the usage of cards for the slot machines. Comps or "cash back" allows to make the differences in the maximum theoretical returns significant.

Australia
One of the most popular Australian poker machine games is Queen of the Nile. Gaming Machines is an official name for Australian slot machines. Physical reels are stimulated by video displays in Australian-style gaming machines. There are usually five of them. 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. The first Australian state to legalize this style of gambling was New South Wales. In 1956 they were made legal in all registered clubs in the state.
The usage of particular forms of gaming machine is allowed in Western Australia.

United Kingdom
The terms fruit machines, one-armed bandits and AWP are used to denote slot machines in Britain. Fruit machines can be met 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. The machine pays winnings if certain combinations of fruit appear. There is similarity between these machines and slot machines seen in casinos and elsewhere around the world. But some extra features can be found. However, the jackpots from these fruit machines are strictly 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. It sometimes increases the chance of winning. A finite number nudges following a spin is given to a player. 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 have "club machines". They charge more per game and have higher jackpots.
These machines differ from American slot machines. The probability of getting the jackpot in each game is independent of any other game.
The AWP fruit machine is popular across 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 are a fairly new phenomenon. There are slot machines in pachinko parlors and the adult sections of amusement arcades, known as game centers.
The machines are regulated with IC chips. They have 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.