[agumonkey]

I always thought it was a bad visual metaphor for open vs closed circuit

[jve]

Yeah. I kind of associated I as a continuous line and O a loop which never works (something like infinite loop).

But not he says it conveys 1 and 0... so simple... true or false. That would have been easier on my brains :)

[agumonkey]

the O was confusing but later the I crossing the O was kinda like a gate to me

it's funny to realize that nobody had the same interpretation of this ubiquitous thing