Here’s a few that I know of. What other things are commonly running Linux that most people may but be aware of?

• Ingenuity (helicopter drone on Mars)
• Smart TVs and streaming devices (Samsung’s TizenOS and Roku devices)
• Smart appliances (Samsung’s smart refrigerator)
• Digital signs and billboards
• My car stereo (Sony XAV-AX6000)
• The Large Hadron Collider
• FAA Air traffic control and radar systems
• Self driving cars