Bonus is a special feature of the particular game theme, which is activated when certain symbols appear in a winning combination. Several items on the screen are presented to the player to choose. A number of credits is revealed and awarded to the player when items are chosen. 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 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 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.
Credit meter is used for displaying the amount of money or credits on the machine.
Drop bucket or Drop box is used for diverting exess coins from the hopper. A drop bucket can usually be found in low denomination slot machines. 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.
EGM is a short-hand for Electronic Gaming Machine.
To denote a payout made by a slot attendant or cage, rather than the slot machine the term Hand pay is used. 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 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. The are shown with the slip.
Low Level or Slant Top slot machines are equipped with a stool for you to sit and play. You will have to stand while 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.
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 term Rollup is used to mean the process of dramatizing a win by playing sounds while the meters count up to the amount that has been won.
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. 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.
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.

There exist at least two types of slot players.
The first type is a persistent player.
This type of slots player is the one that believes the win is right around the corner. The machine can begin paying in any second.
Players become so persistent if they have already spent a lot of money for this slot and haven’t got anything or if they have found a slot machine that haven’t paid for a long period of time. They believe that at least any payout is due to happen. 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. Maybe it can really work if you have already spent thousands of dollars and have got nothing back. The machine can’t but paying.
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.
The chaser.
The player thinks that the machine he is going to play is not a machine that never pays. The player have won and being reinforced by the win gains trust in the slot machine. A sense of comfort exists between the slot machine and the player.

It seems that every type of activity has its own rules of etiquette, and playing the slots is no exception. The first piece of slot machine etiquette is to determine deal or not to deal with particular slot machine. It can be difficult for the solo slot player to save a machine when they go to the rest room or to get a drink, but there are signals that can be used to indicate that a machine is in play. If you hang a coin cup over the handle of the slot machine it will mean that this slot is in play by you. Placing the coin cup on the seat means the same. If you play in the casino that uses a cashless system you can just leave the jacket or one of your belongings on the seat. If you see any of these signals at a particular machine, be sure to respect the signal and move on to a free machine. The second etiquette rule concerns the card left by the previous player. This is an extremely common occurrence, and just about every slot player has either found an abandoned card, left a card in a machine, or both. The accepted way to deal with this situation is to place the player card on top of the slot machine where it can be easily seen and retrieved. Nowadays most casinos allow smoking while playing. Of course, others will hardly like it, so try to make as few inconveniences as possible. Tipping is another difficult issue for many slot players, and many people are unsure how much to tip the attendant that brings the winnings. In the case of a jackpot tip him with 0,5% of your jackpot.

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

Casinos: Native American
There are no slot machines 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. The state is entitled to receive a fraction of the gross revenue from slot machines by the pact.

Slot Machine Classes
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. A player's chance of winning any payout is the same with every play. Nevada or Atlantic City have more Class III slots than any other state. They are sometimes referred to as "Vegas-style slots".
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. A fee for each Class III game is paid by the casino 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. They are competing for a common prize. Each game has a winner. The game stops when the winner appears. In a given set there is a certain number of wins and losses. The combimation that has already occurred cannot occur again until a new batch is initiated. The games depend on one another. The player must be an active participant. The same set of numbers is played by all players.

Characteristics Of Class III Games
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.

Clubs Of Slot Players
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 cards are used to insert into the slot machines in these clubs. Comps or "cash back" from these clubs can make significant differences in the maximum theoretical returns.

Slots In Australia
Queen of the Nile (manufactured by Aristocrat) is one of the most popular Australian poker machine games. Slot machines in Australia are officially termed Gaming Machines. In Australian-style gaming machines video displays are used 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. New South Wales was the first state to legalize this style of gambling. The year of 1956 was the year of their legalization in all registered clubs in the state.
Only particular forms of gaming machine are permitted to be used in Western Australia.

Britain
Fruit machines, one-armed bandits and AWP are the names for 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. If certain combinations of fruit appear, winnings are paid from the machine. There is similarity between these machines and slot machines seen in casinos and elsewhere around the world. These games have lots of extra features. The jackpots from these machines are limited. The UK fruit machines have some features. A player is 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 maximum payout for an individual game is influenced by the type and the location of the machine. Private members' clubs have "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 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.

Japan
Pachisuro are Japanese slot machines. The traditional Japanese pachinko game is their ancestor. Slot machines are 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 are certain rules and regulations in spite of the many varieties of the machines.

All slots work according to one and the same rule. You put coins or money in the slot machine and then pull the handle. Traditionally two main types of slots are distinguished: straight and progressive slots. If you play slots then you are paid in accordance with the payout schedule, which is always shown on the slot. Inside the straight slot group four more types are distinguished. They are multiplier, bonus multiplier, multiple payline and buy-a-pay slots. The bet amount determines the sum of the payout in multiplier slots. The main feature of the bonus multiplier slots is a bonus round, which is activated if you make maximum bets. When playing multiple payline slots remember that the number of coins being bet determines the winning amount. 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 amount of the Progressive jackpot is always shown on the slot.