well, you might be thinking about another jcs but the one i know is that they write it themselfs. their only 12,10 and 6
JCS = Junior Commissioned Secretary
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Meredith Willson wrote the lyrics to the Music Man.
Mozart wrote ternary music.
Andrew Lloyd-Webber wrote the music from Cats.
James Horner wrote the music for the 1996 Titanic.
Yes he is
There are many company's that have initials JCS meaning i am unable to pin point an exact estimate of how many people work in this company/organization.
JOHN WILLIAMS wrote the majority of the music
George Frideric Handel wrote those pieces.
M.G.G. Original wrote Music Star. The song features Hatsune Miku.
He wrote classical music.