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. 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 is used in conjunction with the bonus for displaying 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.
A grouping of slot machines, usually in a circle or oval formation are called Carousel.
Coin hopper is a container where the coins that are immediately available for payouts are held. It is used to rotate coins into the coin tray when a player collects credits. When a certain preset coin capacity is reached, a coin diverter automatically redirects excess coins into a drop bucket, or drop box.
Credit meter is a visual display of the amount of money or credits on the machine.
Drop bucket or Drop box is a container located in a slot machine's base where excess coins are diverted from the hopper. A drop bucket can usually be found in low denomination slot machines. A drop box can be found in high denomination slot machines. A drop bucket doesn't contain a lid while a drop box contains a hinged lid with one or more locks. 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.
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. At the level where the operator must begin to deduct taxes the maximum amount is set. 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 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.
Low Level or Slant Top slot machines are equipped with a stool for you to sit and play. You can only stand playing Stand Up or Upright slot machines.
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. Classic spinning reel machines usually have up to nine pay lines, while video slot machines may have as many as one hundred.
The process of dramatizing a win by playing sounds while the meters count up to the amount that has been won is Rollup.
A partial payout made by a slot machine, which is less than the amount due to the player is called Short pay. It can happen if the coin hopper has been depleted as a result of making earlier payouts to players. An attendant will come and re-fill the machine or the remaining amount will be paid as a hand pay.
Theoretical Hold Worksheet is a document provided by the manufacturer for all slot machines. Basing on adequate levels of coin-in it indicates the theoretical percentage that the slot machine should hold. 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.
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 is called Weight count.

There are at least two types of slot players.
The first type is a persistent player.
These players are sure that the machine is already ready to pay out, they just have to wait for a little. Just a second and the coins will be flying all over the casino!
Players become so persistent if they have already spent a lot of money for this slot and haven’t got anything or if they have found a slot machine that haven’t paid for a long period of time. They know the next big win, or any win is due to pay out. The rush is that if they leave after depositing so much money in the machine it will erupt and the payouts will be often and large. Maybe it can really work if you have already spent thousands of dollars and have got nothing back. The machine must pay.
Many years ago in the case of the payout players touch the coins to check whether he coins were hot or cold. If the coins were hot they believed that the machine had not paid for a long period of time. In fact the coins could be hot only because of the numerous lights that heated the coins.
The second type of slot players is a chaser.
The player believes the slot machine is not one of those machines that never pay. The player have won and being reinforced by the win gains trust in the slot machine. One can feel the atmosphere of comfort and trust between the machine and the player.