A special feature of the particular game theme, which is activated when certain symbols appear in a winning combination is called Bonus. Several items on the screen are presented to the player to choose. After choosing items a number of credits is revealed and awarded. 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.
There is a light on top of the slot machine called Candle. It flashes to alert the operator that change is needed, hand pay is requested or a potential problem with the machine.
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 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.
There is a container located in a slot machine's base that is used to divert excess coins. Typically low denomination slot machines use a drop bucket. And a drop box is used for high denomination slot machines. There is a hinged lid with one or more locks in a drop box and there ais no such lid in a drop bucket. There exists a scheduled basis for collecting and counting the contents of drop buckets and drop boxes.
EGM is 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. 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 short pay can also result in a and 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 are shown with the slip.
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.
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.
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. If the coin hopper has been depleted as a result of making earlier payouts to players the short pay happens. In this case the remaining amount will be paid as a hand pay or an attendant will come and re-fill the machine.
A document provided by the manufacturer for all slot machines is 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.

I tis important to now what you are playing.
It is important to know the correct amount of coins that 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. You can increase your bets only when you are winning, and decrease your bets when you are losing.