postal system

13 LETTERS · STARTS WITH P

postal system is a valid 13-letter word worth 19 points in Scrabble and 21 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

P3O1S1T1A1L1S1Y4S1T1E1M3

3 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 4 + 1 + 1 + 1 + 3 =19 PTS

DOUBLE WORD → 38TRIPLE WORD → 57

MEANING

What does postal system mean?