From the age of pushing On and Off buttons to simply touching a button that would perform both functions, without much thought, don't you think things have really evolved? In this little toggle act, did you notice the symbol electronic gadgets carry to represent the power button - the small circle with a vertical line in it?

To create the symbol for a single On/Off button, the "1" and "0" symbols were super-imposedand merged each other to create the universally recognized power symbol currently in use.

In case you need to make a smartass conversation with someone, you know.