Codes in Listing Titles

[zuzbrews]

I've recently noticed some seller listings that begin with three letter-numeral codes in parentheses, such as (RI5) or (MA6). Sorry for my ignorance, but what do they mean?

[nickelsanddimes2015 · Accepted solution]

Inventory locations identifier so they know where an item is so they can pull it to ship.

[chapeau-noir]

They probably  put them at the beginning to they can sort the listings in their seller hub.  I don't think it's a great idea as that is precious real estate when it comes to search, but oh well.