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. After choosing items a number of credits is revealed and awarded. Some bonuses use a mechanical device, such as a spinning wheel. It works in conjunction with the bonus to display the amount won.
Candle is a light on top of the slot machine. 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.
Coin hopper contains the coins that are immediately available for payouts. 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.
A visual display of the amount of money or credits on the machine is called Credit meter.
There is a container located in a slot machine's base that is used to divert excess coins. It is generally used in low denomination slot machines. A drop box can be found in high denomination slot machines. A drop box contains a hinged lid with one or more locks whereas a drop bucket doesn't contain a lid. The casino collects and counts the contents of drop buckets and drop boxes.
EGM is used as a short-hand for Electronic Gaming Machine.
The term Hand pay means a payout made by a slot attendant or cage, rather than the slot machine. A hand pay occurs when the amount of the payout exceeds the maximum amount that was preset by the slot machine's operator. 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.
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 is Hopper fill. 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.
A stool is included into Low Level or Slant Top slot machines, so you can sit and play. You can only stand playing Stand Up or Upright slot machines.
A payback percentage based on a gambler using the optimal strategy in a skill-based slot machine game is called Optimal play.
The term Payline is used to denote 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.
The process of dramatizing a win by playing sounds while the meters count up to the amount that has been won is Rollup.
If a partial payout made by a slot machine is less than the amount due to the player it is called Short pay. It can happen 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 manufacturer for all slot machines provide them with a document called Theoretical Hold Worksheet. It indicates the theoretical percentage that the slot machine should hold based on adequate levels of coin-in. The worksheet also indicates the reel strip settings, number of coins that may be played, the payout schedule, the number of reels and other information.
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.

I tis important to now what you are playing.
Only the correct amount of money should be inserted into a machine. Cash your credits and only the leave the machine.
While playing just have a good time. You can increase your bets only when you are winning, and decrease your bets when you are losing.