Answer:
I'm not a big tech head but I know that creating a restore point is highly recommended for changing anything that you aren't 100% sure about to your computer.
Answer:
abacus . Mesopotamia or China, possibly several thousand years BCE. ...
binary math . Pingala, India, 3rd century BCE. ...
punched card . Basile Bouchon, France, 1725. ...
Explanation:
:)