[blattimwind]

The A, B, C and D columns are counted front to back. No magic ;)

Notably the thick and angled A columns of modern cars create fairly large blind spots to the front left and right, while wide B columns are problematic for larger drivers, since the B column blocks visibility over the shoulder.

[chrisseaton]

> No magic ;)

Well you need to know that they refer to columns in the car's body in the first place.

[sokoloff]

Exactly. I'm a "car guy" and didn't connect "A column" to a car part. "A pillar" I'd have understood immediately.