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Tag Inventions which changed the world

3 May

Inventions and Discoveries 16

1. Douglas Engelbart invented what A) Mouse B) Keyboard C) Touch screen D) None  2. Neon lights invented in 1911 by A) Leonardo Da Vinci B) Georges Claude C) George Antheil D) Alexandre Alexeieff  3. Jean-Christopher Denner invented what musical instrument A) Piano B) saxophone C) Clarinet D) Steel Drums  4. Percy LeBaron Spencer invented […]

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