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. 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.
There is a light on top of the slot machine called Candle. It flashes when change is needed and hand pay is requested.
A grouping of slot machines, usually in a circle or oval formation are called Carousel.
A container where the coins that are immediately available for payouts are held is 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.
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. Typically, a drop bucket is used for low denomination slot machines. As for high denomination slot machines they use a drop box. There is a hinged lid with one or more locks in a drop box and there ais no such lid in a drop bucket. 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. 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 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 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 include a stool so you can sit and play. Stand Up or Upright slot machines are played while standing.
The term Optimal play means a payback percentage based on a gambler using the optimal strategy in a skill-based slot machine game.
The term Payline means a straight or zigzagged line that crosses through one symbol on each reel, along which a winning combination is evaluated. Classic spinning reel machines usually have up to nine pay lines, while video slot machines may have as many as one hundred.
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.
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. Then the remaining amount is paid as a hand pay or the machine is re-filled by an attendant.
The manufacturer for all slot machines provide them with a document called Theoretical Hold Worksheet. The theoretical percentage that the slot machine should hold based on adequate levels of coin-in is idicated in it. 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.
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.

To know what you are playing is necessary for you.
Only the correct amount of money should be inserted into a machine. Always cash out your credits before leaving a machine.
Only if you have fun your gambling won't be stressful. Be smart and change oyur bets according to your luck.

It is true that slots are designed to be honest and not to deceive a player. But there are some manufactures that design the slots in such a way that they can deceive players.
When the first slots only appeared cheating was impossible because they worked mechanically, with independent wheels spinning and then stopping randomly. Modern slots are much different. There is a chip inside of every slot machine, this chip is programmed to select numbers randomly. The numbers the computer selects correspond to the symbols that appear on the slot machine’s screen. The computer code that generates the random numbers is responsible for whether the machine is “loose” or “tight,” so gaming inspectors look at the machine’s code to make sure that a slot machine doesn’t cheat. There is a legal rate according to which the machine has to pay out. Of course it can pay lower, which happen very seldom.
Because slot machines don’t pay off with every spin, it’s difficult for customers to tell whether a slot machine’s chip has been programmed to pay off less often than is legally required. Inspectors look at brands of machines and their chips before they are installed in casinos, but they can’t inspect each machine. In the case of the approval of the brand the manufactures can produce the slot machines, even change them if it doesn’t go out legal bounds. Some dishonest manufactures use the right to produce machines, but use a different chip, which is programmed to pay less or not so often.
For example, the Nevada Gaming Commission caught American Coin using chips that did not allow poker royal flushes. Similarly, Universal Distributing Company was caught programming machines to show a “near miss” of a jackpot. The player would never hit a jackpot but keep on playing maximum bets. Don’t keep silent if you come across such slot machine. Inspectors will respond by pulling the slot machine’s chip and seeing if it is an approved chip. Manufacturers that cheat are fined or they can lose their license.