From their origins in the late 1800s to their unprecedented popularity in online casinos today, slot machines have evolved into complex and interactive games with thousands of variations – though there’s still room in every casino for a classic one-armed bandit with three reels of fruits and bars and sevens.īut how do slot machines work? It’s a more complicated question than you might imagine.

Whatever you call them, it’s impossible to be even vaguely aware of the world of casinos and gaming without having come across a slot machine.