What Does This Symbol On Every Power B*tton Mean?

See it carefully.

If you focus you can notice that the symbol contains an 'I' and an 'O'.
See it carefully.

Or does it look like '1' and '0'?

Binary numbers, is it?
Or does it look like '1' and '0'?

let's talk about World War.

Yes, history is attached to everything. and similarly, back in the World War, engineers used binary systems to depict power.
let's talk about World War.

You must be aware....

..that in binary system, 1 means on and 0 means off.
You must be aware....

Thus, in 1973..

..International Electrotechnical Commission, IEC standardized this symbol as a power button symbol.
Thus, in 1973..

Since we have to toggle up and down...

..these buttons have separate 'I' and 'O'. o for off and I for on.
Since we have to toggle up and down...

and yes, it is Hot!

Thus, it is even used on a c0nd0m in NYC, which suggests, Power On!
and yes, it is Hot!