LA is Los Angeles. No further comment.
And NC is Northern California and SC is Southern California... of course, people in the North Carolina and South Carolina might differ.
On Atlas, we ordinarily use postal codes for the states.. and should we ever use the letters PR for public relations after Puerto Rico is admitted as the 51st state of the Union (lest President Trump find some way to rush Cuba through military means) we will have to make that clear.
It is obvious that LA means "Los Angeles" in Los Angeles
Times, which is easy for someone who has spent time in Los Angeles but not in Louisiana.
