commercial instrument

NOUN
21 LETTERS · STARTS WITH C

commercial instrument is a valid 21-letter word worth 30 points in Scrabble and 39 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3O1M3M3E1R1C3I1A1L1I1N1S1T1R1U1M3E1N1T1
3 + 1 + 3 + 3 + 1 + 1 + 3 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 =30 PTS
DOUBLE WORD → 60TRIPLE WORD → 90
MEANING

What does commercial instrument mean?