Slot is a slit or other narrow opening, especially one for receiving something, such as a coin. The term is also used for a position or assignment, such as a time slot on a train schedule or an appointment with a doctor. The narrow opening in an ice hockey goal between the face-off circles is called a slot. The meaning “a part of the machine in which a coin can be inserted” is attested from 1888. A computer memory location, especially in very long instruction word (VLIW) computers, is also referred to as a slot.

Despite their popularity, slot games are not without some controversy. While the vast majority of players experience gambling as a harmless form of entertainment, a small percentage can develop serious gambling problems that may lead to financial difficulties, interpersonal issues and even involvement in criminal activities (Blaszczynski et al., 2005). Fortunately, the majority of gamblers avoid these issues by playing responsibly and limiting their losses. One way to do this is by adhering to a responsible gaming policy. A major component of this policy is to promote awareness of the dangers of gambling. In addition, by offering incentives to responsible gamers, such as free play, the gaming industry can encourage responsible behavior.