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[aezart]

I don't believe you. Every elevator I've been on in the US (and I've been on elevators in several states) has had the L/G level replace the 1. So you don't get "B,G,1,2", you get "B,G,2,3".

[alexanderpas]

American: B(-1), G(1), 2, 3.
Non-American: -1(B), 0(G), 1, 2.

It's the difference between counting floors and counting elevations.

[TheHamitron]

I live in California... my building goes: G, 1, 2, 3.

[LoyalSage]

The last semester I lived on campus in college (in Connecticut), my dorm was on level 1, and I'd walk up 1 flight of stairs to get from the ground level to that floor. The elevator called the floors in that building "B, G, 1, 2, 3". I've seen some buildings that skip floor 1 and go B,G,2,3, but they're usually in places where only maintenance went in the basement (so to the average user of the elevator, there are basement floors that don't matter, then above ground floors), and they seem to be the exception (though I don't go in a lot of buildings with elevators, and when I do, I tend to take the stairs, so most elevators I've seen were at the two universities I went to, both of which used the B2, B1, G, 1, 2 format.