Every city has its acronyms. Where I grew up, the MTA was always threatening to strike, meaning that you might have to drive into town on the LIE or the GCP. The NYPD was there to protect and serve. We got our first dog from the ASPCA. I only went to summer camp once--at the Y. When I applied to colleges, I had hoped to go to SUNY, but alas, I ended up at CUNY. My mom worked for the QBPL. During my college years, I worked at JFK, but upon graduation I went to work at MHT. My brother lived in SoHo for a while.
Of course, some acronyms are not regional. I can order a BLT anywhere in this country and be understood. We know which cities have NBA franchises and on Monday nights in the fall everyone knows where to find the NFL game on TV. CNN became a household word during my lifetime, as, sadly, did AIDS.
I don't think we have quite as many acronyms in Arizona as they use in New York City, but if you are new to the area, here are some acronyms every Phoenix resident should know.