When certain symbols appear in a winning combination a special feature of the particular game theme is activated, which is a 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. 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.
There is a light on top of the slot machine called Candle. It alerts the operator that change is needed, hand pay is requested or there is 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.
Coin hopper is a container where the coins that are immediately available for payouts are held. When a player collects credits this mechanical device rotates coins into the coin tray. A coin diverter automatically redirects excess coins into a drop bucket, or drop box when a certain preset coin capacity is reached.
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, a drop bucket is used for 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. There is a scheduled basis on which the contents of drop buckets and drop boxes are collected and counted.
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. 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 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 exists to indicate 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 will have to stand while playing Stand Up or Upright slot machines.
The term Optimal play means a payback percentage based on a gambler using the optimal strategy in a skill-based slot machine game.
Payline is 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. Then the remaining amount is paid as a hand pay or the machine is re-filled by an attendant.
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 are at least two types of slot players.
The first type is a persistent player.
The players of this type believe that very soon there will be a period when the machine begins to pay. 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 believe that at least any payout is due to happen. 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 must pay.
Many years ago in the case of the payout players touch the coins to check whether he coins were hot or cold. If the coins were hot they believed that the machine had not paid for a long period of time. In fact the coins could be hot only because of the numerous lights that heated 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. 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.

Slot machines have a vivid and diverse history. Throughout the years, designs and implementation of slot machines went from mechanical to electronic, and from electronic to digital, then from digital to purely software, but the principles are still the same: the slot machine has reels which spin and, if the pre-defined winning combination plays out, you win. Basically, you just put in the coins and wait to find out whether you won or not.
Basically, slot machines are all 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. In single line slots, the machine has just one line of reels, usually with 4 or 5 wheels, while in multiline there are a number of reel lines. Multi line slots are more difficult to understand because you win according to the winning combinations on the paylines, which can be formed in many ways. It can happen that you win nothing during the game or that you win big in a short while. Paylines can be different. They can be vertical, diagonal, zigzags and what not.
Another interesting variation of the slot machine is a jackpot. If the slot machine has a jackpot it means that a certain amount of each additional bet is added to the jackpot. So the jackpot becomes bigger and bigger with every bet. Jackpots can reach several hundreds of thousands dollars. A certain winning combination hits the jackpot, and the lucky gambler collects everything that the ones before him left behind.
Since slot machines appeared they have been 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. Unlike the table games, slot machines don't involve any decision on the player's part and so aren't threatened by game management systems because of their fixed odds; the bet limits are more of a traditional thing than anything else.
Online slot machines also have RNG, which exclude any possibility to cheat. That’s why slots are as fair as it is only possible.

The USA
The United States state governments regulate the availability of slot machines. To regulate the possession and use of slot machines many states have established gaming control boards. There are no significant restrictions against slot machines in Nevada. Slot machines are allowed only in hotel casinos operated in Atlantic City in New Jersey. 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.

Native American Casinos
Native American casinos located in reservations are not permitted to have slot machines. It becomes possible when the tribe first reaches a pact with the state in which it is located. Typically, a pact entitles the state to receive a fraction of the gross revenue from slot machines.

Classes Of Slot Machines
There is no federal law governing 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. Every play has equal chances of winning any payout. Nevada or Atlantic City have more Class III slots than any other state. They are also called "Vegas-style slots".
There is a connection between "Class II" slot machines ("video lottery terminals" or "VLTs") and a centralized computer system. 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. Class II games are not so tightly regulated by the state.

Characteristics Of Class II Games
The player is playing against other players. Their competition is for a common prize. Each game has a winner. Only when there is a winner the game stops. A given set has a certain number of wins and losses. The combimation can occur again only after a new batch is initiated. There is a dependence of between the games. The player is an active participant of the game. There is the same set of numbers for all players.

Characteristics Of Class III Games
The player is playing against the house. Each game is independent of previous games. The outcome of any game is unpredictable.

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. The cards are used to insert into the slot machines in these clubs. Comps or "cash back" from these clubs makes significant differences in the maximum theoretical returns.

Australia
Queen of the Nile (manufactured by Aristocrat) is one of the most popular Australian poker machine games. Gaming Machines is an official name for Australian slot 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.
There are Gaming machines not only in casinos but also in pubs and clubs in some states. New South Wales was the first state to legalize this style of gambling. Their legalization in all registered clubs in the state was in 1956.
The usage of particular forms of gaming machine is allowed in Western Australia.

The UK
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 are spun. The machine pays winnings if certain combinations of fruit appear. Slot machines seen in casinos and elsewhere around the world are similar to these machines. But there are some extra features. However, the jackpots from these fruit machines are strictly limited. There are some features of fruit machines in the UK. There is an opportunity for a player to hold one or more reels before spinning. The chance of winning can sometimes be increased. 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 depends on the type and the location of the machine. Private members' clubs are allowed to have "club machines". They have higher jackpots and are allowed to charge more per game.
These machines differ from 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
Japanese slot machines are known as pachisuro. The traditional Japanese pachinko game is their ancestor. 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.
IC chips 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 principle of the straight slots is that you get paid according to the schedule listed on the machine itself. 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. The jackpot for Progressive slots is never the same as it grows higher with every coin put in the machine. The amount of the Progressive jackpot is always shown on the slot.