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"The first slot machine was invented back in the late 19th Century by Charles August Fey. The game was called Liberty Bell. Since then the slot machine has come on leaps and bounds and they are accessible all over the planet at land-based casinos and most devices that can access the internet. "
<https://www.slotsource.com/guides/virtual-slots-vs-mechanical-slots-what-s-the-difference>