Which groundbreaking invention was first unveiled to the public at the 1876 Centennial Exhibition in Philadelphia with the famous demonstration line: "Mr. Watson, come here. I want to see you."?

The world of inventions and discoveries has seen many revolutionary product launches that fundamentally changed how we live. Some debuts were meticulously planned marketing spectacles, while others were humble introductions that unexpectedly transformed industries. This trivia question explores a pivotal moment when a groundbreaking invention was first revealed to the public. Test your knowledge of how world-changing innovations made their first appearance!

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• The telephone by Alexander Graham Bell
• The phonograph by Thomas Edison
• The electric lightbulb by Joseph Swan
• The typewriter by Christopher Sholes

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