A special feature of the particular game theme activated when certain symbols appear in a winning combination is Bonus. Several items on the screen are presented to the player to choose. After choosing items a number of credits is revealed and awarded. Some bonuses use a mechanical device, such as a spinning wheel. 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. 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 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. A coin diverter automatically redirects 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. As for high denomination slot machines they use a drop box. There is a hinged lid with one or more locks in a drop box and there ais no such lid in a drop bucket. The casino collects and counts 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. A hand pay occurs when the amount of the payout exceeds the maximum amount that was preset by the slot machine's operator. 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 slip is 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. 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.
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.
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. 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.
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. Then the remaining amount is paid as a hand pay or the machine is re-filled by an attendant.
The manufacturer for all slot machines provide them with a document 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.

There are at least two types of slot players.
Persistent player.
These players are sure that the machine is already ready to pay out, they just have to wait for a little. The machine can begin paying in any second.
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 believe that a big win is sure to happen right now. 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 will pay any way.
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 chaser.
The player thinks that the machine he is going to play is not a machine that never pays. 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.