What are the tags after HP Prime model numbers? (i.e. #ABA, #B1S)

[TheLastMillennial]

I've seen a lot of confusion on the internet about the difference among 2AP18AA, 2AP18AA#ABA, and 2AP18AA#B1S. Although I know that they're all HP Prime G2s, I don't know what those tags mean. I only found one post that says the tags might indicate what country the calculator was meant to be sold in. I also saw someone say it might indicate the hardware revision.

I'd like to put the confusion to rest and I'm curious if there's a place that matches each tag to the country (or hardware revision) it specifies.

EDIT: The tags are the target Market
#ABA:

Sold in the USA.
Contains US warranty
Contains US wall adapter
Contains USB charging cable and calculator-to-calculator cable

#B1S:

Sold in Europe
Does NOT contain a wall adapter
Contains USB charging cable and calculator-to-calculator cable