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 to the player when items are chosen. A mechanical device, such as a spinning wheel is used by some bonuses. The amount won is displayed with the help of it 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.
Carousel refers to a grouping of slot machines, usually in a circle or oval formation.
Coin hopper contains the coins that are immediately available for payouts. It rotates coins into the coin tray when a player collects credits. There is a coin diverter used for redirecting 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.
A a container located in a slot machine's base where excess coins are diverted from the hopper is Drop bucket or Drop box. Typically, a drop bucket is used for low denomination slot machines. High denomination slot machines use a drop box. A drop box contains a hinged lid with one or more locks whereas a drop bucket doesn't contain a lid. 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.
To denote a payout made by a slot attendant or cage, rather than the slot machine the term Hand pay is used. 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 could also be necessary as 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 are shown with the slip.
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.
A payback percentage based on a gambler using the optimal strategy in a skill-based slot machine game is called Optimal play.
A straight or zigzagged line that crosses through one symbol on each reel, along which a winning combination is evaluated is called Payline. 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.
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.
The term Theoretical Hold Worksheet. Is used to denote 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.

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.
While playing just have a good time. If you feel lucky increase your bets and vice-versa.