When certain symbols appear in a winning combination a special feature of the particular game theme is activated, which is a Bonus. The player can choose from several items shown on a screen. A number of credits is revealed and awarded as the player chooses items. Some bonuses use a mechanical device, such as a spinning wheel. To display the amount won it works in conjunction with the bonus.
There is a light on top of the slot machine called Candle. When change is needed, hand pay is requested or a potential problem with the machine appears it flashes.
Slot machines in a circle or oval formation are usually called Carousel.
There is a container where the coins that are immediately available for payouts are held called Coin hopper. The hopper is a mechanical device that rotates coins into the coin tray when a player collects credits. 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 a visual display of the amount of money or credits on the machine.
Drop bucket or Drop box is used for diverting exess coins from the hopper. Typically, a drop bucket is used for low denomination slot machines. And a drop box is used for 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. There is a scheduled basis on which the contents of drop buckets and drop boxes are collected and counted.
Electronic Gaming Machine is called EGM.
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 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 short pay can also result in a and 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 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.
Optimal play is a payback percentage based on a gambler using the optimal strategy in a skill-based slot machine game.
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.
Rollup is the process of dramatizing a win by playing sounds while the meters count up to the amount that has been won.
If a partial payout made by a slot machine is less than the amount due to the player it is called Short pay. This occurs if the coin hopper has been depleted as a result of making earlier payouts to players. 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. 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.

To know what you are playing is necessary for you.
Always make sure that you insert the correct amount of coins into a machine. Your credits should be cashed out before you leave the machine.
Slots shouldn't be a stress for you, just enjoy. You can increase your bets only when you are winning, and decrease your bets when you are losing.