C posts, A posts, B posts?

[rob.hardy1]

Can someone please point me in the direction of a simple diagram of a minor (prefferably a traveller) indication what post is what. Reading the posts would be more interesting if i new the code.
ta

[Peetee]

Start at the front, A post is the screen pillar,
B post is the pillar behind the front door and c-post is the rear door hinge pillar on a traveller and doesn't really exist on a saloon.

[jonathon]

The A post is the front door hinge pillar ,B post is the rear door hinge pillar and the C post is really the slam panel that the rear door closes onto