A special feature of the particular game theme activated when certain symbols appear in a winning combination is Bonus. In the bonus, the player is presented with several items on a screen from which 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 works in conjunction with the bonus to display the amount won.
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.
Slot machines in a circle or oval formation are usually called Carousel.
A container where the coins that are immediately available for payouts are held is coin hopper. The hopper is a mechanical device that rotates coins into the coin tray when a player collects credits. A coin diverter is used to redirect 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.
There is a container located in a slot machine's base that is used to divert excess coins. A drop bucket can usually be found in low denomination slot machines. High denomination slot machines 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 casino collects and counts the contents of drop buckets and drop boxes.
EGM is used as 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. Usually, 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.
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. 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.
A stool is included into Low Level or Slant Top slot machines, so you can 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.
Payline is a straight or zigzagged line that crosses through one symbol on each reel, along which a winning combination is evaluated. 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.
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. The remaining amount due to the player is either paid as a hand pay or an attendant will come and re-fill the machine.
Theoretical Hold Worksheet is a document provided by the manufacturer for all slot machines. 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.

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. Slot machines use random numbergenerator and that's exactly that. Random.
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.
It is not as simple as that. The casino can’t just change the chip of the slot machine. It is illegal and it has to be permitted by the commission.
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.
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.
One more rude mistake. The chances and odds are always the same. It doesn’t matter when you play.