[EricH]

Originally Posted by Andrew Schreiber

BAE Granite State Regional, it is a Regional. I'll let someone more informed than me tell you more (Im a Midwest guy myself)

Several of the regionals have been given a three-letter "nickname". Here are a few:

GSR--Granite State Regional
SVR--Silicon Valley Regional
GTR--Greater Toronto Regional
MWR--Midwest Regional
WPI--WPI Regional

There are some others, but they've had a name change or two and no longer have an applicable common three-letter nickname.