Unknown facts about "ON" "OFF" Button

Have ever you observed on every electrical gadget like Laptop, AC, Fridge etc we can see the ON OFF Button? There was Logical Fact behind ON, OFF Button.

If you focus on the “ON” “OFF” button we can see the structures as “O I” alphabets, but they are not “O”, “I” alphabets actually they are Digit numbers (TEN) 10. In the Time of World War-II Engineers kept (TEN) “1”  “0” button present on the Electric gadgets. Basically computers runs on BINARY CODE LANGUAGE and it stores data in (TEN) “1” “0” format and there Logic Gates Structure was constructed based on these LOGICAL GATES “1” Stands for “ON” and “0” stands for “OFF”.