ON3P stands for thirteenth and Proctor.
13th and proctor was the location of the house in Tacoma, WA that I lived when the idea of making skis was born. I was attending school at the time so it took awhile to get the ball rolling, but here we are.
What it really means is 1 3 P. So if you were to write out one 3 P and remove the e, you get ON3P.
There are a few ways to say it. All are ok with me....but the way I PREFER to say it is....
O N 3 P skis. Said out like that.
If you were to say On(e) 3 P that would also be acceptable.
Or you could just call it thirteenth and proctor.
But from my lips, it is said O N 3 P and that is the correct way of saying it, regardless of what some of my friends will try and convince you of.
Hope that clears it up.