pls what is POS

[b]P[/b]oint [b]O[/b]f [b]S[/b]ale, PoS

This refers/could refer to a retail shop, a checkout counter in a store, or the location where a transaction occurs.

More specifically, the point of sale often refers to the hardware and software used for checkouts -- the equivalent of an electronic cash register. Something like the hand-held terminal where you can use you debit/credit cards.