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

https://www.bookmark-jungle.win/discover-how-slot-machines-evolved-from-charles-fey-s-simple-three-reel-design

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