When certain symbols appear in a winning combination a special feature of the particular game theme is activated, which is a 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 is used in conjunction with the bonus for displaying the amount won.
A light on top of the slot machine is 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.
There is a container where the coins that are immediately available for payouts are held called Coin hopper. When a player collects credits this mechanical device rotates coins into the coin tray. 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 a container located in a slot machine's base where excess coins are diverted from the hopper. Typically low denomination slot machines use a drop bucket. 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. There is a scheduled basis on which the contents of drop buckets and drop boxes are collected and counted.
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. At the level where the operator must begin to deduct taxes the maximum amount is set. A hand pay can also be 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 are shown with the slip.
Playing Low Level or Slant Top slot machines you can sit as they have a stool. Stand Up or Upright slot machines are played while standing.
A payback percentage based on a gambler using the optimal strategy in a skill-based slot machine game is called Optimal play.
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. Classic spinning reel machines usually have up to nine pay lines, while video slot machines may have as many as one hundred.
Rollup is the process of dramatizing a win by playing sounds while the meters count up to the amount that has been won.
The term Short pay is used to mean 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.
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 exist 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 believe that at least any payout is due to happen. They can’t leave the machine because as soon as they do it will burst forth and pay out large sums. Maybe it can really work if you have already spent thousands of dollars and have got nothing back. The machine can’t but paying.
In the old days when a payout occurred players would feel the coins to see if they were hot or cold. If the coins where hot then the slot machine had not paid out in a while and to the chaser this was good as the machine was do. In fact the coins could be hot only because of the numerous lights that heated the coins.
The chaser.
There is some kind of comfort and trust between the slot machine and the player.