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.
Andrew Lloyd-Webber wrote the music from Cats.
Mozart wrote ternary music.
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.