Slots have come a long way since Charles Fey’s original three-reel machine....

https://casinocrowd.com/the-7-big-inventions-behind-modern-slot-games/

Slots have come a long way since Charles Fey’s original three-reel machine. From coin-fed cabinets to Bally’s Money Honey with its electromechanical features, then to video slots, browser games, and smartphone play, the evolution is fascinating