I feel zAy0LfpBZLC8mAc responded to the rest of your post fine - so I'm only going to add my own opinion regarding your last statement: >So if we were to label

I feel zAy0LfpBZLC8mAc responded to the rest of your post fine - so I'm only going to add my own opinion regarding your last statement: >So if we were to label to cars in increasing numeric order from one end to the other, we would start with 0 instead of 1 at the first car? We don't do that with building levels. You enter on the first floor, go to the elevator, and you push a button for the floor level. The first floor is 1. 0 Would be the basement level. We opted for the word "Ground Floor" instead of "Zeroth Floor" likely due to the associations people make of "zero" (ie. not existing) and because it may have sounded weird but the concept is the same. The U.K and U.S refer to different storeys as the "first floor". In the U.S, the first floor is considered the ground floor and in the U.K the first floor is considered the second storey. A source of headaches when told the place you're looking at is on the first floor and you spend ages looking for it on the ground floor.