"No" - traditionally used over a
radio where the short word "no" could easily get lost in static.
Radio operators (and
people who heard them) have brought it into face to face language.
<trucker 1 over
radio> Is my turn signal working?
<trucker
2> No.
<trucker 1> Say that again, you broke up.
<trucker
2> Negatory. It's not working.